Processing method of water-drop-shaped diamond with heart-shaped hollow-out effect

Abstract

The invention discloses a processing method of a water-drop-shaped diamond with a heart-shaped hollow-out effect. The processing method comprises the following steps: selecting a near-pear-shaped blank and symmetrically cutting the near-pear-shaped blank; the round-scraping blank forms a cylindrical waist part, a hexadecagonal pyramid pavilion part and a table-shaped crown part, and the cross section of the waist part is in a water drop shape; with the longitudinal section of the waist portion as the reference, four first-class edges inclining towards the tip end of the blank and four second-class edges inclining towards the tail end of the blank are ground; by taking the surface surrounded by the lower waist edge of the waist part as a reference, polishing 16 waist lower facets at a first included angle in the direction far away from the crown part; based on the intersecting edges of the adjacent waist lower facets, first to sixteenth small waist lower facets are ground along the preset edges; 16 crown main surfaces are ground on the basis of the central surface of the waist part, and 8 triangular star lobes are ground at the joint angle positions of every two adjacent crown main surfaces and the table surface of the crown part at intervals. The unique heart-shaped hollowed-out design is integrated in the center of the diamond, and the problem that a center inclusion is serious is ingeniously solved.

Description

Technical Field

[0001] The invention belongs to the technical field of diamond processing, and in particular relates to a method for processing a teardrop-shaped diamond with a heart-shaped hollowing effect. Background Art

[0002] As a precious gemstone, the number and layout of diamond facets significantly influences its optical quality, aesthetics, and value. However, common diamond cut designs currently on the market have limitations in terms of light reflection and refraction, making it difficult to fully meet consumer demand for ultimate brilliance. Furthermore, the presence of inclusions is a key factor affecting the value of both natural and synthetic diamonds. Currently, common treatment methods for trace internal impurities include laser micropore ablation combined with acid etching. However, these methods inevitably leave white pore marks within the diamond, which must be clearly marked on the relevant certificate, significantly reducing the diamond's quality and market value. In the case of large-scale inclusions, the diamond is often treated as waste, greatly limiting its value.

[0003] To address these issues, the present invention proposes an innovative cutting design: by creating a unique combination of 89 facets—41 on the crown, 16 on the girdle, and 32 on the pavilion—this design significantly enhances the diamond's refractive index and overall optical performance. It also incorporates a unique heart-shaped hollow design at the center. This design imbues diamonds with new meaning while cleverly resolving the common problem of severe center inclusions, offering a fresh perspective on diamond design and processing. Summary of the Invention

[0004] The purpose of the present invention is to address the problems existing in the prior art and provide a method for processing a teardrop-shaped diamond with a heart-shaped hollowing effect.

[0005] To achieve the above-mentioned purpose, the invention adopts the following technical solution: a method for processing a teardrop-shaped diamond with a heart-shaped hollow effect, comprising the steps of: Select a nearly pear-shaped blank and cut it symmetrically; The blank is rounded to form a cylindrical waist, a hexagonal pyramid pavilion, and a trapezoidal crown, giving it a teardrop-shaped waist cross-section. The crown height accounts for 22% to 24% of the total height, the waist height accounts for 8% to 10%, and the pavilion height accounts for 66% to 70%. The pavilion angle near the tip of the teardrop-shaped blank is 35° to 35.5°, and the pavilion angle near the tail is 42.5° to 43°. Based on the longitudinal section of the waist, four first-class edges tending to the tip of the blank are polished at 53° to 53.5°, 41° to 41.7°, 24.3° to 24.6°, and 13° to 13.5°, respectively. Four second-class edges tending to the tail end of the blank are polished at 15° to 15.3°, 44.5° to 44.8°, 62° to 63°, and 80° to 80.5°. With the surface enclosed by the girdle edge as a reference, 16 girdle facets are polished at a first angle in a direction away from the crown. Based on the intersecting edges of adjacent girdle facets, the first to sixteenth small girdle facets are polished along the predetermined edges at angles of 35°-36°, 47°-48°, 59°-61°, and 55°-56°, respectively. Every four adjacent facets correspond to one angle range. With the center plane of the girdle as the reference, 16 main crown faces are polished at a base angle of 39° to 40°. Eight triangular star petals are polished at an angle of 33° to 35° at the intersection of two adjacent main crown faces and the table of the crown. 16 upper girdle faces are polished at an angle of 29° to 30° on the ridges adjacent to the main crown faces. Laser ablation with a wavelength of 1064 nm and a pulse energy of 10 to 15 J, combined with etching with a hydrofluoric acid solution with a concentration of 30% to 35%, was used to process a heart-shaped hollow structure with an aspect ratio of 1: (1±0.05) at the position where the central axis of the teardrop-shaped diamond coincided, obtaining the finished product.

[0006] In the above technical solution, the balance between the mechanical stability and optical performance of the water drop shape is achieved by precisely controlling the proportions of the crown (22% to 24%), waist (8% to 10%), and pavilion (66% to 70%). The differentiated pavilion angle design (tip 35° to 35.5° / tail 42.5° to 43°) enhances the streamlined shape of the water drop and optimizes the total internal reflection path. The four types of edge angle combinations (53° to 53.5°, etc., 15° to 43°, etc.) are used to create a more balanced and precise water drop shape. 15.3° and other second categories) form a complex refractive surface network to enhance the fire performance; the diamond center incorporates a unique heart-shaped hollow design, which cleverly solves the problem of serious central inclusions and provides a new approach to diamond design and processing. At the same time, the fusion of heart-shaped hollowing and teardrop outline, symmetrical facet design, and optimized optical path give the diamond both a unique shape and high-brightness fire; combining traditional teardrop cutting and hollowing technology, it fills the technical gap in the processing of heart-shaped hollow diamonds and meets high-end customization needs. Finally, laser + hydrofluoric acid composite processing technology achieves high-precision etching of the heart-shaped hollow, avoiding the microcracks caused by traditional mechanical processing.

[0007] Optionally, the total height ratio of the crown, girdle and pavilion is selected from one of the following combinations: Crown 22%, girdle 8%, pavilion 70%; Crown 23%, girdle 9%, pavilion 68%; The crown is 24%, the girdle is 10%, and the pavilion is 66%.

[0008] The above technical solution provides three sets of diamond segmentation ratios to cover the adaptation needs of rough diamonds of different carats, maximizing the weight of the finished product while maintaining structural strength. At the same time, the gradient change in the ratio can match the natural morphological differences of pear-shaped rough diamonds, thereby reducing the processing loss rate.

[0009] Optionally, the first type of edge can be polished at angles of 53.3°, 41.3°, 24.5°, and 13.3°. This precise angle setting ensures a more precise light path within the diamond, thereby maximizing the diamond's reflection and refraction effects, resulting in a more dazzling brilliance. Furthermore, precise angle control helps ensure harmony and symmetry between the various parts of the diamond, further enhancing its overall quality.

[0010] Optionally, the second-type edges can be polished at angles of 15°, 44.6°, 62°, and 80°. Precisely setting these angles can also optimize the path of light within the diamond, enhancing its optical properties. Precise angle control ensures the coordinated coordination between the second-type edges, the first-type edges, and other components, allowing the diamond to exhibit richer brilliance and fire at different angles, further enhancing its beauty and value.

[0011] Optionally, the four angle ranges of the small lower-girdle facets correspond to 34° to 36°, 46° to 48°, 59° to 61°, and 54.5° to 56.5°, respectively, and four facets are continuously machined within each angle range. By limiting the four angle ranges of the small lower-girdle facets and continuously machining four facets within each angle range, this design ensures a more uniform and regular distribution of the small lower-girdle facets across the diamond, thereby further refining the reflection and refraction paths of light and making the diamond's brilliance more delicate and rich. Furthermore, this angular range setting ensures coordination between the small lower-girdle facets and other parts, enhancing the diamond's overall optical performance and appearance.

[0012] Optionally, the base angle of the crown facet is 39.5°, the polishing angle of the star petals is 34°, and the polishing angle of the upper girdle is 29.5°. The 39.5° crown facet base angle combined with the 34° star petal angle creates an ideal table reflectivity of 57.4%. The 29.5° upper girdle angle causes secondary reflection of edge light, enhancing edge brilliance. These precise angle settings ensure more precise positioning and shape of the crown facets, star petals, and upper girdle facets on the diamond, thereby optimizing the reflection and refraction effects of the diamond crown, making the diamond appear brighter and more dazzling at the top. Furthermore, precise angle control helps ensure coordination and symmetry between the various parts of the diamond, further enhancing the overall quality and aesthetics of the diamond.

[0013] Optionally, the polished lengths of the first to sixteenth small lower haunch facets are H1, H2, H3 and H4, respectively, and the lengths of H1, H2, H3 and H4 increase in sequence. The incremental length design of H1 to H4 (gradient of approximately 0.2 to 0.5 mm) forms a dynamic light intensity distribution, simulating the light and shadow flow effect of real water droplets; the length difference is controlled within ±5% to balance mechanical strength and optical performance.

[0014] Optionally, the pavilion angle near the tip of the blank is 35° and the pavilion angle at the tail end is 43°.

[0015] Optionally, the bottom angle of the crown main surface is 39.5°, and the sixteen crown main surfaces are mirror-distributed with the central axis as the axis of symmetry.

[0016] By adopting this technical solution, the base angle of the crown facets was determined to be 39.5°, and the sixteen crown facets were mirrored about the central axis. This design ensures a more precise and symmetrical position and shape of the crown facets on the diamond, thereby optimizing the reflection and refraction effects of the diamond crown, making the top of the diamond appear brighter and more dazzling. Furthermore, the mirrored distribution design ensures coordination and consistency among the various components of the diamond crown, further enhancing the overall quality and aesthetics of the diamond.

[0017] Compared with the existing technology, the beneficial effects of the present invention are: by arranging 41, 16 and 32 facets on the crown, girdle and pavilion respectively, a total of 89 facets, not only can the refractive effect and overall optical performance of the diamond be significantly improved, but also a unique heart-shaped hollow design is incorporated into the center of the diamond, which cleverly solves the serious problem of central inclusions and provides a new idea for the design and processing of diamonds; the fusion of heart-shaped hollowing and teardrop contours, symmetrical facet design, and optical path optimization give the diamond both a unique shape and high-brightness fire; combined with traditional teardrop cutting and hollowing technology, it fills the technical gap in the processing of heart-shaped hollow diamonds and meets high-end customization needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional effect diagram of a diamond after a heart-shaped hollowing process is completed in an embodiment of the present invention; Figure 2 A bottom view of the pavilion of a diamond with 16 lower girdle facets machined in accordance with an embodiment of the present invention; Figures 3 to 22 This is a progress diagram of machining small lower girdle facets on the pavilion of a diamond according to an embodiment of the present invention; Figure 23 This is a top view of the main crown surface of the diamond crown after processing in an embodiment of the present invention; Figure 24 This is a top view of the diamond crown after the star petals are processed in an embodiment of the present invention; Figure 25 This is a top view of the diamond crown after the upper girdle is processed in an embodiment of the present invention; Figure 26 This is a three-dimensional rendering of a diamond before it is drilled in an embodiment of the present invention; Figure 27 This is a top view of the crown of the diamond after the heart-shaped hollowing is completed in an embodiment of the present invention.

[0019] In the figure: 1. Crown; 2. Girdle; 3. Pavilion; 11. First Lower-Half Facet; 12. Second Lower-Half Facet; 13. Third Lower-Half Facet; 14. Fourth Lower-Half Facet; 15. Fifth Lower-Half Facet; 16. Sixth Lower-Half Facet; 17. Seventh Lower-Half Facet; 18. Eighth Lower-Half Facet; 19. Ninth Lower-Half Facet; 20. Tenth Lower-Half Facet; 21. Eleventh Lower-Half Facet; 22. Twelfth Lower-Half Facet; 23. Thirteenth Lower-Half Facet; 24. Fourteenth Lower-Half Facet; 25. Fifteenth Lower-Half Facet; 26. Sixteenth Lower-Half Facet; 99. First Minor Lower-Half Facet; 92. Second Minor Lower-Half Facet ; 93. Third small lower-side facet; 94. Fourth small lower-side facet; 95. Fifth small lower-side facet; 96. Sixth small lower-side facet; 97. Seventh small lower-side facet; 98. Eighth small lower-side facet; 99. Ninth small lower-side facet; 1100. Tenth small lower-side facet; 1101. Eleventh small lower-side facet; 1102. Twelfth small lower-side facet; 1103. Thirteenth small lower-side facet; 1104. Fourteenth small lower-side facet; 1105. Fifteenth small lower-side facet; 1106. Sixteenth small lower-side facet; 1107. First crown main facet; 1108. Second crown main facet; 1199. Table facet. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0022] like Figures 1 to 27 As shown, a method for processing a teardrop-shaped diamond with a heart-shaped hollow effect includes the following steps: S1. Select a nearly pear-shaped blank and perform symmetrical cutting; S2. Scrape the blank to form a cylindrical waist, a hexagonal pyramid pavilion, and a trapezoidal crown, so that the waist cross-section is teardrop-shaped; wherein the crown height accounts for 22% to 24% of the total height, the waist height accounts for 8% to 10%, and the pavilion height accounts for 66% to 70%; the pavilion angle near the tip of the teardrop-shaped blank is 35° to 35.5°, and the pavilion angle near the tail end is 42.5° to 43°; S3. Based on the longitudinal section of the waist, grind out four first-class edges tending toward the tip of the blank at angles of 53° to 53.5°, 41° to 41.7°, 24.3° to 24.6°, and 13° to 13.5°, respectively. Then grind out four second-class edges tending toward the tail end of the blank at angles of 15° to 15.3°, 44.5° to 44.8°, 62° to 63°, and 80° to 80.5°. S4. Using the facets enclosed by the girdle as a reference, polish 16 girdle facets at the first angle away from the crown. S5. Based on the intersecting edges of adjacent lower haunch facets, polishing the first to sixteenth small lower haunch facets along the predetermined edges at angles of 35° to 36°, 47° to 48°, 59° to 61°, and 55° to 56°, respectively, wherein every four adjacent facets correspond to one angle range in sequence; S6. Using the center plane of the girdle as a reference, polish 16 crown main faces at a base angle of 39° to 40°. At an included angle of 33° to 35°, polish 8 triangular star petals at the intersection of two adjacent crown main faces and the table of the crown. Polish 16 upper girdle faces at an angle of 29° to 30° on the adjacent ridges of the crown main faces. S7. Laser ablation with a wavelength of 1064 nm and a pulse energy of 10 to 15 J, combined with etching with a hydrofluoric acid solution having a concentration of 30% to 35%, is used to process a heart-shaped hollow structure with an aspect ratio of 1: (1 ± 0.05) at the position where the central axis of the teardrop-shaped diamond coincides, to obtain a finished product.

[0023] In the above technical solution, the balance between the mechanical stability and optical performance of the water drop shape is achieved by precisely controlling the proportions of the crown (22% to 24%), waist (8% to 10%), and pavilion (66% to 70%). The differentiated pavilion angle design (tip 35° to 35.5° / tail 42.5° to 43°) enhances the streamlined shape of the water drop and optimizes the total internal reflection path. The four types of edge angle combinations (53° to 53.5°, etc., 15° to 43°, etc.) are used to create a more balanced and precise water drop shape. 15.3° and other second categories) form a complex refractive surface network to enhance the fire performance; the diamond center incorporates a unique heart-shaped hollow design, which cleverly solves the problem of serious central inclusions and provides a new approach to diamond design and processing. At the same time, the fusion of heart-shaped hollowing and teardrop outline, symmetrical facet design, and optimized optical path give the diamond both a unique shape and high-brightness fire; combining traditional teardrop cutting and hollowing technology, it fills the technical gap in the processing of heart-shaped hollow diamonds and meets high-end customization needs. Finally, laser + hydrofluoric acid composite processing technology achieves high-precision etching of the heart-shaped hollow, avoiding the microcracks caused by traditional mechanical processing.

[0024] In this embodiment, the total height ratio of the crown, girdle, and pavilion is selected from one of the following combinations: Crown 22%, girdle 8%, pavilion 70%; Crown 23%, girdle 9%, pavilion 68%; The crown is 24%, the girdle is 10%, and the pavilion is 66%.

[0025] The above technical solution provides three sets of diamond segmentation ratios to cover the adaptation needs of rough diamonds of different carats, maximizing the weight of the finished product while maintaining structural strength. At the same time, the gradient change in the ratio can match the natural morphological differences of pear-shaped rough diamonds, thereby reducing the processing loss rate.

[0026] In this embodiment, the first type of edge is polished at angles of 53.3°, 41.3°, 24.5°, and 13.3°. This precise angle setting ensures a more precise light path within the diamond, thereby maximizing the diamond's reflection and refraction, resulting in a more dazzling and brilliant light. Furthermore, precise angle control helps ensure harmony and symmetry between the various parts of the diamond, further enhancing its overall quality.

[0027] In this embodiment, the polishing angles for the second-type edges are 15°, 44.6°, 62°, and 80°. Precisely setting these angles also optimizes the light propagation path within the diamond, enhancing its optical properties. Precise angle control ensures the coordinated coordination between the second-type edges, the first-type edges, and other components, allowing the diamond to exhibit richer brilliance and fire at different angles, further enhancing its aesthetics and value.

[0028] In this embodiment, the four angle ranges of the small lower-girdle facets correspond to 34°-36°, 46°-48°, 59°-61°, and 54.5°-56.5°, respectively. Four facets are continuously machined within each angle range. By limiting the small lower-girdle facets to four angle ranges and continuously machining four facets within each angle range, this design ensures a more uniform and regular distribution of the small lower-girdle facets across the diamond, further refining the reflection and refraction paths of light and making the diamond's brilliance more delicate and rich. Furthermore, this angular range ensures coordination between the small lower-girdle facets and other components, enhancing the diamond's overall optical performance and appearance.

[0029] In this embodiment, the base angle of the crown facets is 39.5°, the polished angle of the star lobes is 34°, and the polished angle of the upper girdle is 29.5°. The 39.5° base angle of the crown facets combined with the 34° star lobes angle creates an ideal table reflectivity of 57.4%. The 29.5° upper girdle angle creates secondary reflections at the edges, enhancing edge brilliance. These precise angle settings ensure the precise positioning and shape of the crown facets, star lobes, and upper girdle facets on the diamond, optimizing the reflection and refraction effects of the diamond's crown, resulting in a brighter and more dazzling brilliance at the top. Furthermore, precise angle control helps ensure harmony and symmetry among the various components of the diamond, further enhancing its overall quality and aesthetics.

[0030] In this embodiment, the polished lengths of the first to sixteenth lower haunch facets are H1, H2, H3, and H4, respectively, with H1, H2, H3, and H4 increasing in length. The design of the increasing lengths of H1 to H4 (with a gradient of approximately 0.2 to 0.5 mm) creates a dynamic light intensity distribution, simulating the light and shadow flow effect of a real water droplet. The length difference is controlled within ±5%, balancing mechanical strength and optical performance.

[0031] In this embodiment, the pavilion angle near the tip of the blank is 35°, and the pavilion angle at the tail end is 43°.

[0032] In this embodiment, the bottom angle of the crown main surface is 39.5°, and the sixteen crown main surfaces are mirror-imaged with the central axis as the axis of symmetry.

[0033] By adopting this technical solution, the base angle of the crown facets was determined to be 39.5°, and the sixteen crown facets were mirrored about the central axis. This design ensures a more precise and symmetrical position and shape of the crown facets on the diamond, thereby optimizing the reflection and refraction effects of the diamond crown, making the top of the diamond appear brighter and more dazzling. Furthermore, the mirrored distribution design ensures coordination and consistency among the various components of the diamond crown, further enhancing the overall quality and aesthetics of the diamond.

[0034] According to the above technical solution, the following embodiments are provided: Example 1:

[0035] In the above technical solution, steps S1 to S3 correspond to the following (1) to (3) respectively; (1) See Figure 3 , select the rough blank and cut it. A nearly pear-shaped rough blank should be selected.

[0036] (2) See Figure 4 The rough diamond is rounded to create a cylindrical girdle, a nearly conical base below the girdle, and a trapezoidal crown above the girdle, giving it a teardrop-shaped girdle. The crown accounts for 23.5% of the total height, the girdle 9%, and the pavilion 68%. The pavilion angle near the tip of the teardrop rough diamond is 35°, and near the end is 43°.

[0037] (3) See Figure 5 ~ 7. Grind the waist of the blank. Taking the longitudinal section of the waist as the reference, grind out four edges s1 ~ s4 on one side tending to the tip of the teardrop-shaped blank at 53.3°, 41.3°, 24.5°, and 13.3° to the longitudinal section respectively. Then grind out four edges s5 ~ s8 on the side tending to the tail end of the teardrop-shaped blank at 15°, 44.6°, 62°, and 80° to the longitudinal section respectively.

[0038] S4, based on the surface surrounded by the girdle edge, polish 16 girdle facets at the first angle away from the crown, see Figure 8 .

[0039] S5. Based on the intersecting edges of adjacent lower haunch facets, polishing the first to sixteenth small lower haunch facets along the predetermined edges at angles of 35° to 36°, 47° to 48°, 59° to 61°, and 55° to 56°, respectively, wherein every four adjacent facets correspond to one angle range in sequence, specifically comprising the following steps: (4) See Figure 9 Based on the first edge 101 where the first lower haunch facet 11 and the second lower haunch facet 12 intersect, a first predetermined length H1 is polished from the cusp 100 along the second edge 102 on the second lower haunch facet 12 at an angle of 35° to form a first small lower haunch facet 91.

[0040] (5) See Figure 10 Based on the first edge 101 where the first lower haunch facet 11 and the second lower haunch facet 12 intersect, a first predetermined length H1 is polished from the cusp 100 along the sixteenth edge 116 on the first lower haunch facet 11 at an angle of 35° to form a second small lower haunch facet 92.

[0041] (6) Participate Figure 11Based on the point 121 on the girdle line and the point 122 of the predetermined length H1 polished on the second edge 102 on the third lower girdle facet 13, a triangular bottom facet is cut out with the pointed bottom 100 to form a third small lower girdle facet 93.

[0042] (7) See Figure 12 Based on the point 124 on the girdle line on the sixteenth lower girdle facet 26 and the point 123 on the sixteenth edge 116 polished with a predetermined length H1, a triangular bottom facet is cut out with the cusp 100 to form a fourth small lower girdle facet 94.

[0043] (8) See Figure 12 Based on the third edge 103 where the third lower haunch facet 13 and the fourth lower haunch facet 14 intersect, a second predetermined length H2 is polished from the cusp 100 along the fourth edge 104 on the fourth lower haunch facet 14 at an included angle of 47° to form a fifth small lower haunch facet 95.

[0044] (9) See Figure 13 Based on the fifteenth edge 115 where the sixteenth lower haunch facet 26 and the fifteenth lower haunch facet 25 intersect, a second predetermined length H2 is polished from the culet 100 along the fourteenth edge 114 on the fourteenth lower haunch facet 24 at an included angle of 47.5° to form a sixth small lower haunch facet 96.

[0045] (10) See Figure 13 Based on the upper point 125 on the girdle line on the fifth lower girdle facet 15 and the point 126 of the predetermined length H2 polished on the fourth edge 104, a triangular bottom facet is cut out with the cusp 100 to form a seventh small lower girdle facet 97.

[0046] (11) See Figure 14 Based on the point 128 on the waist line on the fourteenth lower haunch facet 24 and the point 127 on the fourteenth edge 114 polished with a predetermined length H2, a triangular bottom facet is cut out with the cusp 100 to form an eighth small lower haunch facet 98.

[0047] (12) See Figure 15 Based on the fifth edge 105 where the fifth lower haunch facet 15 and the sixth lower haunch facet 16 intersect, a third predetermined length H3 is polished from the cusp 100 along the sixth edge 106 on the sixth lower haunch facet 16 at an included angle of 60° to form a ninth small lower haunch facet 99.

[0048] (13) Participate Figure 16 Based on the thirteenth edge 113 where the fourteenth lower haunch facet 24 and the thirteenth lower haunch facet 23 intersect, a third predetermined length H3 is polished from the culet 100 along the twelfth edge 112 on the thirteenth lower haunch facet 23 at an included angle of 60° to form a tenth small lower haunch facet 1100; (14) See Figure 17 Based on the point 130 on the girdle line on the seventh lower girdle facet 17 and the point 129 with a predetermined length H3 polished on the sixth edge 106, a triangular bottom facet is cut out with the cusp 100 to form an eleventh small lower girdle facet 1101.

[0049] (15) See Figure 18 Based on the point 132 on the girdle line on the twelfth lower girdle facet 22 and the point 131 on the twelfth edge 112 polished with a predetermined length H3, a triangular bottom facet is cut out with the pointed bottom 100 to form a twelfth small lower girdle facet 1102.

[0050] (16) See Figure 19 Based on the first edge 107 where the seventh lower haunch facet 17 and the eighth lower haunch facet 18 intersect, a fourth predetermined length H4 is polished from the culet 100 along the eighth edge 108 at an included angle of 55.5° on the eighth lower haunch facet 18 to form a thirteenth small lower haunch facet 1103.

[0051] (17) See Figure 20 Based on the first edge 111 where the eleventh lower haunch facet 21 and the twelfth lower haunch facet 22 intersect, a fourth predetermined length H4 is polished from the cusp 100 along the tenth edge 110 on the eleventh lower haunch facet 11 at an included angle of 55.5° to form a fourteenth small lower haunch facet 1104.

[0052] (18) See Figure 21 Based on the point 134 on the girdle line of the ninth lower haunch facet 19 and the point 133 of the predetermined length H4 polished on the eighth edge 108, a triangular bottom facet is cut out with the cusp 100 to form the fifteenth small lower haunch facet 1105.

[0053] (19) See Figure 22 Based on the point 134 on the girdle line of the tenth lower girdle facet 20 and the point 135 of the predetermined length H4 polished on the tenth edge 110, a triangular bottom facet is cut out with the cusp 100 to form a sixteenth small lower girdle facet 1106.

[0054] S6. Using the center plane of the girdle as a reference, polish 16 crown main faces at a base angle of 39° to 40°, polish 8 triangular star petals at the intersection of two adjacent crown main faces and the table of the crown at an angle of 33° to 35°, and polish 16 upper girdle faces at an angle of 29° to 30° on the ridges adjacent to the crown main faces, specifically comprising the following steps: (20) Steps (23) to (27) are steps for processing the diamond crown to form a crown structure with 16 main crown faces and 24 triangular faces (see Figure 24 ).

[0055] (21) See Figure 23 , with the center plane of the waist as the reference, the crown is ground at a bottom angle of 39.5° to produce the first set of sixteen main crown surfaces, and the table 1199 of the crown is octagonal.

[0056] (22) Figure 23 Based on the diamond shown, with the center plane of the girdle as the reference, the crown is surfaced at a bottom angle of 29.5° to form a first crown main face 1107 and a second crown main face 1108.

[0057] (23) See Figure 24 ,by Figure 23 Based on the diamond shown, with the center plane of the waist as the reference, the angle of 34° is used to grind at the intersection of the two adjacent crown main faces and the table of the crown, forming 8 triangular star petals at every other angle.

[0058] (24) See Figure 25 ~ 26, Figure 24 Based on the diamond shown, the adjacent diamonds of the 16 crown main faces are faceted at an angle of 29.5° with the center plane of the waist as the reference, forming a total of 16 upper waist facets.

[0059] S7, see Figure 1 and Figure 27 ,by Figure 26 Based on the teardrop-shaped diamond shown in the figure, laser ablation with a wavelength of 1064nm and a pulse energy of 10 to 15J, combined with corrosion with a hydrofluoric acid solution with a concentration of 30% to 35%, was used to process a heart-shaped hollow structure with an aspect ratio of 1: (1±0.05) at the position where the central axis of the teardrop-shaped diamond coincided, to obtain the finished product. Example 2:

[0060] The processing steps used in Example 2 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 22% of the total height, 8% of the total height, and 68% of the total height. The crown is polished at an angle of 35° on the first lower girdle facet 11, and the main surface of the crown is based on the center plane of the girdle. The crown is polished at a bottom angle of 29°. Example 3:

[0061] The processing steps used in Example 3 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 24% of the total height, 10% of the total height, and 70% of the total height. The crown is polished at an angle of 36° on the first lower girdle facet 11, and the main surface of the crown is based on the center plane of the girdle. The crown is polished at a bottom angle of 30°. Example 4:

[0062] The processing steps used in Example 4 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 22% of the total height, 8% of the total height, and 68% of the total height. The eighth lower girdle facet 18 is cut at an angle of 55°, and the sixth lower girdle facet 16 is cut at an angle of 59°. Example 5:

[0063] The processing steps used in Example 5 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 22% of the total height, 8% of the total height, and 68% of the total height. The eighth lower girdle facet 18 is cut at an angle of 56°, and the sixth lower girdle facet 16 is cut at an angle of 61°. Example 6:

[0064] The processing steps used in Example 6 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 24% of the total height, 10% of the total height, and 70% of the total height. The first lower girdle facet 11 is processed at an angle of 35°, and the fourth lower girdle facet 14 is processed at an angle of 47°. Example 7:

[0065] The processing steps used in Example 7 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 24% of the total height, 10% of the total height, and 70% of the total height. The first lower girdle facet 11 is processed at an angle of 35°, and the fourth lower girdle facet 14 is processed at an angle of 48°. Example 8:

[0066] The processing steps used in Example 8 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 24% of the total height, 10% of the total height, and 70% of the total height. The first lower girdle facet 11 is processed at an included angle of 36°, the fourth lower girdle facet 14 is processed at an included angle of 47°, and the eighth lower girdle facet 18 is processed at an included angle of 55°. Example 9:

[0067] The processing steps used in Example 9 are similar to those in Example 1, except that: The total height of the crown, girdle and pavilion is 24% of the total height, 10% of the total height, and 70% of the total height. The first lower girdle facet 11 is processed at an included angle of 36°, the fourth lower girdle facet 14 is processed at an included angle of 48°, and the eighth lower girdle facet 18 is processed at an included angle of 56°.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing a teardrop-shaped diamond with a heart-shaped hollow effect, characterized in that: Including steps: Select a nearly pear-shaped blank and cut it symmetrically; The blank is rounded to form a cylindrical waist, a hexagonal pyramid pavilion, and a trapezoidal crown, giving it a teardrop-shaped waist cross-section. The crown height accounts for 22% to 24% of the total height, the waist height accounts for 8% to 10%, and the pavilion height accounts for 66% to 70%. The pavilion angle near the tip of the teardrop-shaped blank is 35° to 35.5°, and the pavilion angle near the tail is 42.5° to 43°. Based on the longitudinal section of the waist, four first-class edges tending to the tip of the blank are polished at 53° to 53.5°, 41° to 41.7°, 24.3° to 24.6°, and 13° to 13.5°, respectively. Four second-class edges tending to the tail end of the blank are polished at 15° to 15.3°, 44.5° to 44.8°, 62° to 63°, and 80° to 80.5°. Taking the surface surrounded by the girdle as the reference, 16 girdle facets are polished at the first angle in the direction away from the crown. Based on the intersecting edges of adjacent lower haunch facets, the first to sixteenth small lower haunch facets are polished along the predetermined edges at angles of 35°-36°, 47°-48°, 59°-61°, and 55°-56°, respectively. Every four adjacent facets correspond to one angle range in turn. With the center plane of the girdle as the reference, 16 main crown faces are polished at a base angle of 39° to 40°. Eight triangular star petals are polished at an angle of 33° to 35° at the intersection of two adjacent main crown faces and the table of the crown. 16 upper girdle faces are polished at an angle of 29° to 30° on the ridges adjacent to the main crown faces. Laser ablation combined with hydrofluoric acid solution etching was used to process a heart-shaped hollow structure with an aspect ratio of 1: (1±0.05) at the position where the central axis of the teardrop-shaped diamond coincided, to obtain the finished product.

2. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The total height ratio of the crown, girdle and pavilion is selected from one of the following combinations: Crown 22%, girdle 8%, pavilion 70%; Crown 23%, girdle 9%, pavilion 68%; The crown is 24%, the girdle is 10%, and the pavilion is 66%.

3. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The grinding angles of the first type of edges are 53.3°, 41.3°, 24.5° and 13.3°.

4. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The grinding angles of the second type of edges are 15°, 44.6°, 62° and 80°.

5. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The four angle ranges of the small lower haunch facets correspond to 34° to 36°, 46° to 48°, 59° to 61°, and 54.5° to 56.5°, respectively, and four facets are processed continuously in each angle range.

6. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The bottom angle of the crown main surface is 39.5°, the polishing angle of the star petals is 34°, and the polishing angle of the upper girdle surface is 29.5°.

7. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The polishing lengths of the first to sixteenth small lower haunch facets are H1, H2, H3 and H4 respectively, and the lengths of H1, H2, H3 and H4 increase in sequence.

8. The teardrop-shaped diamond processing method according to claim 1, characterized in that: The pavilion angle near the tip of the blank is 35°, and the pavilion angle at the tail end is 43°.

9. The teardrop-shaped diamond processing method according to claim 5, characterized in that: The bottom angle of the crown main surface is 39.5°, and the sixteen crown main surfaces are mirror-distributed with the central axis as the axis of symmetry.

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