Method for distinguishing commercial attributes of emerald based on ultraviolet fluorescence microscopic structure

Abstract

This invention relates to the field of jadeite testing technology, and more particularly to a method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure. This invention, for the first time, combines microscopic observation with ultraviolet excitation for a more accurate determination of the commercial attributes of jadeite. New jadeite (Grade A) typically does not emit ultraviolet fluorescence; while both natural Grade A old jadeite and treated jadeite exhibit ultraviolet fluorescence, natural Grade A old jadeite has a clearly defined ultraviolet fluorescence morphology corresponding to a dotted, reticulated, ternary composite structure; whereas treated jadeite, due to strong acid and alkali corrosion, exhibits a blurred, vein-like network pattern and clustered, patchy ultraviolet fluorescence morphology. This addresses the current problem in commercial inspection where the presence of blue-white ultraviolet fluorescence is used to misclassify wax-containing natural Grade A old jadeite as Grade B or B+C jadeite. This provides a new direction and approach for more accurate determination of the commercial attributes of jadeite and the development of related commercial inspection equipment.

Description

Technical Field

[0001] This invention relates to the field of jadeite testing technology, and in particular to a method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure. Background Technology

[0002] Old jadeite, also known as antique jadeite or old piece jadeite, includes old mine jadeite or old mine pebble jadeite (referring to old mine pebble jadeite produced in the alluvial valley of the Uru River in Myanmar) and some new mine mountain jadeite mined after 1881 (the seventh year of the Guangxu Emperor's reign). It mainly refers to jadeite processed using manual spinning machines and inefficient jade-cutting sand (handmade) during the Qing Dynasty and the Republic of China period and earlier, and the finished products have all undergone the ancient method of waxing for enhancement. Old jadeite is a type of jadeite (jadeite) or pyroxene jade, with sodium aluminum pyroxene content of at least 95% as the main mineral component, formed by the interweaving of short columnar and columnar granular sodium aluminum pyroxene crystals. It may contain small amounts of amphibole, feldspar, chromite, and clay minerals. Therefore, the characteristics of old jadeite focus on traditional handcrafting and the ancient method of waxing enhancement. Specifically, this includes old mine jadeite from before 1958 and some new mine jadeite from 1881-1958. These pieces were handcrafted and generally underwent cleaning processes involving boiling in plum juice or soaking in wood ash, followed by the ancient method of waxing (usually using biological waxes including beeswax and insect wax). The biological wax, in liquid form, seeps into the internal structure of the jadeite through its capillaries, loose edges, and ice cracks. After cooling, it solidifies and crystallizes, filling the gaps and resulting in the old jadeite's oily luster, warm and lustrous appearance, and crystal-clear shine. Furthermore, old jadeite exhibits ultraviolet fluorescence, generally displaying a bluish-white fluorescence, with a small amount emitting a grass-green or even orange-red fluorescence.

[0003] New jadeite, also known as new-work jadeite, new-pit jadeite, or new-pit mountain material, refers to jadeite mined in the back mountain area of ​​the upper reaches of the Uru River in Myanmar since 1881. It is a product of modern high-speed electrical polishing, with a clean and flawless mirror-like glassy luster. The later waxing (usually modern chemical paraffin wax) enhancement process of new jadeite products, whether it is the liquid state of stewing wax or the solid state of applying wax, cannot penetrate the internal structure of the jadeite through the lens. It can only polish the surface of the finished new jadeite products, playing a role in covering cracks, dirt, and flaws, and beautifying the color.

[0004] In the commercial sense, Grade A jadeite refers to natural jadeite that is unbleached, untreated, and undyed. This includes new mine jadeite without internal organic matter and old mine jadeite containing organic matter (which must not be plastic resin and / or dye). Whether it's mine jadeite or jadeite, jadeite that underwent processing in the pre-electrical era, such as soaking in plum juice, straw ash, and stewing in biological wax, was considered an enhancement accepted by society and the industry. This definition conforms to the recommended national standard GB / T16552-2017 "Narration of Gemstones and Jade" regarding the definition and regulations of enhancement.

[0005] Grade B jadeite refers to jadeite that has undergone chemical treatment (or bleaching) and resin injection, specifically through strong acid and alkali corrosion. These processes alter the natural structure and luster of the jadeite and are unacceptable to society and the industry. This definition aligns with the recommended national standard GB / T16552-2017 "Narration of Gemstones and Jewelry" regarding treatments.

[0006] B+C grade jadeite refers to jadeite that has undergone chemical treatment (or bleaching), resin injection, and dyeing due to strong acid and alkali corrosion. These processes alter the natural structure, luster, and color of the jadeite, and are unacceptable to society and the industry. This definition aligns with the recommended national standard GB / T16552-2017 "Narration of Gemstones and Jewelry" regarding the definition and regulations for optimization.

[0007] One method for commercial inspection of jadeite (A: natural, B: treated) is to utilize its fluorescence properties. Specifically, the presence of ultraviolet fluorescence is used to determine the commercial attributes of jadeite. Resin-injected jadeite emits strong but uneven bluish-white ultraviolet fluorescence, while new jadeite typically does not. However, natural A-grade old jadeite, due to its internal filling with biological wax, will exhibit weak but uniform ultraviolet fluorescence. Using current commercial inspection standards, it is easy to misidentify A-grade old jadeite. This misidentification of A-grade jadeite can easily harm the collection, identification, evaluation, and trading of old jadeite, hindering its market circulation and the old jadeite collecting industry. Therefore, it is necessary to seek a better method for determining the commercial attributes of jadeite. Summary of the Invention

[0008] Therefore, based on the above background, the present invention provides a method for identifying the commercial attributes of jadeite based on ultraviolet fluorescence microstructure. This method identifies the commercial attributes (Grade A, Grade B, or Grade B+C) of jadeite based on its ultraviolet fluorescence microstructure, thereby avoiding misidentification of Grade A jadeite and damage to its value.

[0009] The technical solution provided by this invention is as follows: A method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure includes the following steps: 1) Clean the jade; 2) Obtain microscopic images of the ultraviolet fluorescence luminescence characteristics of the jadeite samples; 3) Analyze the microscopic images of the ultraviolet fluorescence luminescence characteristics of the jadeite samples obtained in step 2): ①If the jadeite sample does not exhibit ultraviolet fluorescence, it can be determined that the jadeite is a new jadeite without organic matter filling it. ② If the jadeite sample exhibits ultraviolet fluorescence, and the microscopic image of the ultraviolet fluorescence characteristics obtained in step 2) shows that there is an interlaced, tightly embedded structure of short columnar sodium aluminum pyroxene crystals and a dotted and reticulated structure, and exhibits a weak fluorescence morphology with clear outlines corresponding to the dotted and reticulated structure, then the jadeite is determined to be a natural A-grade old jadeite filled with crystalline wax. The dotted mesh structure includes capillaries that appear as scattered stars, a grid formed by crisscrossing non-directional relaxed boundaries, and directional ice crack patterns. If the jadeite sample exhibits ultraviolet fluorescence, and the microscopic image of the ultraviolet fluorescence luminescence characteristics obtained in step 2) shows a vein-like network lacking independent capillaries, and exhibits a blurred outline of the vein-like network and a strong fluorescent morphology in patches and clusters, then the jadeite is determined to be B-grade or B+C-grade jadeite filled with plastic resin.

[0010] Furthermore, the old jadeite refers to old mine seed material hand-processed before 1958, containing natural wax filling; the new jadeite refers to new mine mountain material processed with power tools after 1972, with a glassy luster on the surface.

[0011] Furthermore, in step 2), a microscopic image of the ultraviolet fluorescence luminescence characteristics of the jade sample can be obtained using an ultraviolet fluorescence microscope.

[0012] Furthermore, in step 2), a microscopic image of the ultraviolet fluorescence emission characteristics of the jade sample can be obtained by using a digital microscope and an ultraviolet flashlight.

[0013] Furthermore, in step 2), ultraviolet light with a wavelength of 365 nm or 253.7 nm is used to obtain a microscopic image of the ultraviolet fluorescence emission characteristics.

[0014] Furthermore, in step 2), ultraviolet light with a wavelength of 365 nm is used to obtain a microscopic image of the ultraviolet fluorescence emission characteristics.

[0015] Based on the same inventive concept, the present invention also provides a system for identifying the commercial attributes of jadeite based on ultraviolet fluorescence microstructure, characterized in that it includes modules for the above method, the modules including an ultraviolet fluorescence microscopic image acquisition module, an image feature analysis module and a comparison module; The ultraviolet fluorescence microscopic image acquisition module is used to acquire ultraviolet fluorescence microscopic images of jade. The analysis module is used to analyze the fluorescence morphology of ultraviolet fluorescence micrographs of jadeite and compare it with a standard jadeite structure database, thereby determining the commercial attributes of jadeite.

[0016] The beneficial effects achieved by this invention are as follows: This invention, for the first time, combines microscopic observation with ultraviolet excitation for a more accurate determination of the commercial attributes of jadeite. New jadeite (Grade A) typically does not emit ultraviolet fluorescence because its inherent dotted-reticulate ternary composite structure lacks organic filling. While both natural Grade A old jadeite and treated jadeite (Grade B or B+C) exhibit ultraviolet fluorescence, the colorless crystalline wax filling the natural dotted-reticulate ternary composite structure of natural Grade A old jadeite, due to the presence of trace amounts of unsaturated components, emits weak and uniform ultraviolet fluorescence with clearly defined outlines. The ultraviolet fluorescence morphology corresponds to the dot-reticulate ternary combination structure; however, after treatment, the inherent dot-reticulate structure of jadeite (B-grade or B+C-grade) is destroyed by strong acid and alkali corrosion, forming a vein-like network without capillaries. Therefore, its ultraviolet fluorescence morphology presents a blurred vein-like network and patches and clusters. This can solve the problem in the current commodity inspection that the presence of blue-white ultraviolet fluorescence alone can lead to the misjudgment of wax-containing natural A-grade old jadeite as B-grade or B+C-grade. This provides a new direction and idea for the more accurate identification of the commercial attributes of jadeite and the development of commodity inspection equipment. Attached Figure Description

[0017] Appendix Figure 1 The microstructure (top, middle, and bottom) of purplish-red old jadeite under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) light is shown at 100x magnification.

[0018] Appendix Figure 2 The microstructure of red old jadeite at 100x magnification under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) light (top, middle, and bottom).

[0019] Appendix Figure 3 The microstructure (upper, middle, and lower) of the purplish-red old jadeite under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) light.

[0020] Appendix Figure 4 The microstructure (top, middle, and bottom) of imperial green old jadeite under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) light is shown at 100x magnification.

[0021] Appendix Figure 5 The microstructure of yellow old jadeite at 100x magnification under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) light (top, middle, and bottom).

[0022] Appendix Figure 6 The microstructure (top, middle, and bottom) of eggplant-purple old jadeite under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) light is shown at 100x magnification.

[0023] Appendix Figure 7Microstructure of bleached, resin-injected, and dyed green jadeite at 100x magnification under no UV, long-wave ultraviolet (LW), and short-wave ultraviolet (SW) irradiation (top, middle, and bottom).

[0024] Appendix Figure 8 Microstructure (top, middle, and bottom) of bleached, resin-injected, and dyed green jadeite under irradiation with no ultraviolet light, long-wave ultraviolet (LW), and short-wave ultraviolet (SW).

[0025] Appendix Figure 9 Microstructure of bleached and resin-dyed light green jadeite at 100x magnification under no UV and long-wave ultraviolet (LW) irradiation (top and bottom).

[0026] Appendix Figure 10 Microstructure of bleached and resin-dyed light green jadeite at 100x magnification under no UV and long-wave ultraviolet (LW) irradiation (top and bottom).

[0027] Appendix Figure 11 Microstructure of bleached and resin-dyed light green jadeite at 100x magnification under no UV and long-wave ultraviolet (LW) irradiation (top and bottom).

[0028] Appendix Figure 12 The microstructure of green old jadeite at 100x magnification in ultraviolet light transmission mode and ultraviolet light-free mode (top and bottom).

[0029] Appendix Figure 13 The microstructure of green old jadeite under ultraviolet light transmission mode at 100x magnification. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The technical solution of the present invention: A method for determining the commercial attributes of jadeite based on in-situ microstructure includes the following steps: 1) Clean the jade with distilled water or alcohol; 2) Obtain microscopic images of the ultraviolet fluorescence luminescence characteristics of the jadeite samples; In this step, an ultraviolet fluorescence microscope, or a digital microscope and an ultraviolet flashlight, can be used to obtain microscopic images of the ultraviolet fluorescence luminescence characteristics of the jade sample using ultraviolet light with a wavelength of 365nm (LW) or 253.7nm (SW).

[0032] Preferably, ultraviolet fluorescence microscopy images are obtained by irradiation with ultraviolet light at a wavelength of 365 nm. 3) Analyze the microscopic images of the ultraviolet fluorescence luminescence characteristics of the jadeite samples obtained in step 2): ①If the jadeite sample does not exhibit ultraviolet fluorescence, it can be determined that the jadeite is a new jadeite without organic matter filling it. ② If the jadeite sample exhibits ultraviolet fluorescence, and the microscopic image of the ultraviolet fluorescence characteristics obtained in step 2) shows that there is an interlaced, tightly embedded structure of short columnar sodium aluminum pyroxene crystals and a dotted and reticulated structure, and exhibits a weak fluorescence morphology with clear outlines corresponding to the dotted and reticulated structure, then the jadeite is determined to be a natural A-grade old jadeite filled with crystalline wax. The dotted mesh structure includes capillaries that appear as scattered stars, a grid formed by crisscrossing non-directional relaxed boundaries, and directional ice crack patterns. If the jadeite sample exhibits ultraviolet fluorescence, and the microscopic image of the ultraviolet fluorescence luminescence characteristics obtained in step 2) shows a vein-like network lacking independent capillaries, and exhibits a blurred outline of the vein-like network and a strong fluorescent morphology in patches and clusters, then the jadeite is determined to be B-grade or B+C-grade jadeite filled with plastic resin.

[0033] The old jadeite refers to jadeite from old mines that was hand-processed before 1958 and contains natural wax filling; the new jadeite refers to jadeite from new mines that was processed with power tools after 1972 and has a glassy luster. The new jadeite is jadeite that has not been filled with organic matter and is commercially classified as Grade A jadeite.

[0034] Based on the following characteristics of old jadeite, the present invention has developed its technical solution.

[0035] New jadeite surfaces are often polished with chemical paraffin wax, which is composed of saturated hydrocarbons. Because saturated hydrocarbons (such as...) Alkanes contain only single bonds (CC and CH) and lack π electrons that produce fluorescence, so they usually do not exhibit ultraviolet fluorescence under ultraviolet light. Resin-injected jadeite, on the other hand, is composed of benzene rings, which are 100% unsaturated chemical bonds. These unsaturated chemical bonds possess π electrons that produce fluorescence, and under ultraviolet light, they usually emit strong ultraviolet fluorescence. Wax-containing old jadeite, whether naturally formed from the geological evolution of old mine jadeite or crystallized from the infiltration of biological wax oil during the ancient wax-stewing process, contains trace amounts of unsaturated chemical bonds (UH component, or active component). These unsaturated chemical bonds possess π electrons that produce fluorescence, and they usually emit weak ultraviolet fluorescence. This is the theoretical basis for the weak ultraviolet fluorescence of old jadeite. Jadeite has a naturally formed, complete dot-reticulate ternary structure. The dot-reticulate space in new jadeite is empty, while the dot-reticulate ternary structure of old jadeite... The space in the structure is filled with colorless, transparent, solid crystalline wax oil, as the applicant has proven. Therefore, new jadeite usually does not emit ultraviolet fluorescence, while the ultraviolet fluorescence of old jadeite is limited to the wax crystal filling in the dotted and reticulated patterns. Since the sodium aluminum pyroxene crystals that do not emit ultraviolet fluorescence are intact and the dotted and reticulated structure is intact, old jadeite has a weak ultraviolet fluorescence structure with a clear outline and a three-element combination of dotted and reticulated patterns. Resin-injected jadeite must have undergone acid and alkali corrosion bleaching in the early stage. The sodium aluminum pyroxene crystals that make up the jadeite are dissolved by acid and alkali, and the original three-element combination structure of dotted and reticulated patterns is destroyed. The capillaries are dissolved and enlarged, the loose grain boundaries are dissolved and enlarged, and the ice cracks are dissolved and enlarged, forming a vein-like network (width from micrometers to millimeters) structure where the originally independent and uniformly distributed capillaries (dots) have disappeared. In addition, the strong adhesiveness of the filling plastic resin causes it to appear in clumps and sheets in the jadeite structure. Therefore, resin-injected jadeite has a vein-like network with blurred outlines and lacking capillaries (dots), and a strong ultraviolet fluorescence structure in clumps and sheets. Appendix Figure 1 To be continued Figure 13 To obtain ultraviolet fluorescence microscopic images of jade (microscopic images of ultraviolet fluorescence luminescence characteristics): Appendix Figure 1 The images were obtained using a USB digital microscope and a special flashlight for jade identification, emitting both long and short wavelengths of ultraviolet light. As can be seen from the images, the space filling of the dotted reticulated ternary composite structure of old jade is colorless and transparent solid crystalline wax. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence, and only the crystalline wax emits weak and uniform blue-white ultraviolet fluorescence, showing a clearly outlined ternary ultraviolet fluorescent luminescent structure.

[0036] Appendix Figure 2The images were obtained using a USB digital microscope and a special flashlight for jade identification, emitting both long and short wavelengths of ultraviolet light. As can be seen from the image, the space filling of the dotted reticulated ternary composite structure of old jade is colorless and transparent solid crystalline wax. The sodium aluminum pyroxene structure does not emit ultraviolet fluorescence, and only the crystalline wax emits weak and uniform blue-white ultraviolet fluorescence, showing a clearly outlined ternary ultraviolet fluorescent luminescent structure.

[0037] Appendix Figure 3 The images were obtained using a USB digital microscope and a special flashlight for jade identification, emitting both long and short wavelengths of ultraviolet light. As can be seen from the images, the space filling of the dotted reticulated ternary composite structure of old jade is colorless and transparent solid crystalline wax. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence, and only the crystalline wax emits weak and uniform blue-white ultraviolet fluorescence, showing a clearly outlined ternary ultraviolet fluorescent luminescent structure.

[0038] Appendix Figure 4 The images were obtained using a USB digital microscope and a special flashlight for jade identification, emitting both long and short wavelengths of ultraviolet light. As can be seen from the images, the space filling of the dotted reticulated ternary composite structure of old jade is colorless and transparent solid crystalline wax. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence, and only the crystalline wax emits weak and uniform blue-white ultraviolet fluorescence, showing a clearly outlined ternary ultraviolet fluorescent luminescent structure.

[0039] Appendix Figure 5 The images were obtained using a USB digital microscope and a special flashlight for jade identification, emitting both long and short wavelengths of ultraviolet light. As can be seen from the images, the space filling of the dotted reticulated ternary composite structure of old jade is colorless and transparent solid crystalline wax. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence, and only the crystalline wax emits weak and uniform blue-white ultraviolet fluorescence, showing a clearly outlined ternary ultraviolet fluorescent luminescent structure.

[0040] Appendix Figure 6 The images were obtained using a USB digital microscope and a special flashlight for jade identification, emitting both long and short wavelengths of ultraviolet light. As can be seen from the images, the space filling of the dotted reticulated ternary composite structure of old jade is colorless and transparent solid crystalline wax. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence, and only the crystalline wax emits weak and uniform blue-white ultraviolet fluorescence, showing a clearly outlined ternary ultraviolet fluorescent luminescent structure.

[0041] Appendix Figure 7 To obtain the image using long and short wavelength ultraviolet light emitted by a USB digital microscope and a special flashlight for jade identification, it can be seen from the figure that the dot-reticulate ternary combination structure of the resin-injected jade is destroyed into a vein-like network lacking capillaries. The space is filled with colored solid plastic resin. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence. Only the plastic resin can emit strong and uneven, clumped and patchy blue-white ultraviolet fluorescence, showing a blurred outline of the vein-like network ultraviolet fluorescence luminescent structure.

[0042] Appendix Figure 8To obtain the image using long and short wavelength ultraviolet light emitted by a USB digital microscope and a special flashlight for jade identification, it can be seen from the figure that the dot-reticulate ternary combination structure of the resin-injected jade is destroyed into a vein-like network lacking capillaries. The space is filled with colored solid plastic resin. The sodium aluminum pyroxene structure does not produce ultraviolet fluorescence. Only the plastic resin can emit strong and uneven, clumped and patchy blue-white ultraviolet fluorescence, showing a blurred outline of the vein-like network ultraviolet fluorescence luminescent structure.

[0043] From the above Figures 1 to 8 It is evident that, since short-wave (SW 253.7nm) ultraviolet light has stronger energy than long-wave (LW 365nm) ultraviolet light and has a blue tint, the observation effect of short-wave ultraviolet fluorescence is worse than that of long-wave ultraviolet fluorescence.

[0044] Appendix Figure 9 To obtain the image using a USB digital microscope and a special flashlight for jade identification, long-wave ultraviolet light was used. As can be seen from the image, the dot-reticulate ternary combination structure of the resin-injected jadeite was destroyed, resulting in a vein-like network lacking capillaries. The space was filled with colored solid plastic resin. The sodium aluminum pyroxene structure did not produce ultraviolet fluorescence. Only the plastic resin emitted strong, uneven, and patchy blue-white ultraviolet fluorescence, showing a blurred outline of the vein-like network ultraviolet fluorescence luminescent structure.

[0045] Appendix Figure 10 To obtain the image using a USB digital microscope and a special flashlight for jade identification, long-wave ultraviolet light was used. As can be seen from the image, the dot-reticulate ternary combination structure of the resin-injected jadeite was destroyed, resulting in a vein-like network lacking capillaries. The space was filled with colored solid plastic resin. The sodium aluminum pyroxene structure did not produce ultraviolet fluorescence. Only the plastic resin emitted strong, uneven, and patchy blue-white ultraviolet fluorescence, showing a blurred outline of the vein-like network ultraviolet fluorescence luminescent structure.

[0046] Appendix Figure 11 To obtain the image using a USB digital microscope and a special flashlight for jade identification, long-wave ultraviolet light was used. As can be seen from the image, the dot-reticulate ternary combination structure of the resin-injected jadeite was destroyed, resulting in a vein-like network lacking capillaries. The space was filled with colored solid plastic resin. The sodium aluminum pyroxene structure did not produce ultraviolet fluorescence. Only the plastic resin emitted strong, uneven, and patchy blue-white ultraviolet fluorescence, showing a blurred outline of the vein-like network ultraviolet fluorescence luminescent structure.

[0047] Appendix Figure 12Images were acquired using a Leica DMRX research-grade ultraviolet fluorescence microscope from the Chinese Academy of Sciences, in both open and reflected light modes. As shown in the images, the old jadeite exhibits a complete granular mosaic structure with well-defined boundaries, displaying a typical dotted reticulated ternary composite structure. However, the spaces within the dotted reticulated structure are filled with organic matter, which emits ultraviolet fluorescence. This is the weak but uniform blue-white ultraviolet fluorescence emitted by the colorless, transparent, solid crystalline wax within the dotted reticulated ternary composite structure of the old jadeite, revealing a clearly defined ternary ultraviolet fluorescent luminescent structure.

[0048] Appendix Figure 13 The images were obtained using a Leica DMRX research-grade ultraviolet fluorescence microscope from the Chinese Academy of Sciences in ultraviolet transmitted light mode. As shown in the images, the old jadeite exhibits a complete granular mosaic structure with intact boundaries, displaying a typical dotted reticulated ternary composite structure. However, the spaces within the dotted reticulated structure are filled with organic matter, which emits ultraviolet fluorescence. This is the weak and uniform blue-white ultraviolet fluorescence emitted by the colorless, transparent, solid crystalline wax within the dotted reticulated ternary composite structure of the old jadeite, revealing a clearly defined ternary ultraviolet fluorescent luminescent structure.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown are only one of the embodiments of the present invention. The actual implementation scheme is not limited to this. In short, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure, characterized in that, It includes the following steps: 1) Clean the jade; 2) Obtain microscopic images of the ultraviolet fluorescence luminescence characteristics of the jadeite samples; 3) Analyze the microscopic images of the ultraviolet fluorescence luminescence characteristics of the jadeite samples obtained in step 2): ①If the jadeite sample does not exhibit ultraviolet fluorescence, it can be determined that the jadeite is a new jadeite without organic matter filling it. ② If the jadeite sample exhibits ultraviolet fluorescence, and the microscopic image of the ultraviolet fluorescence characteristics obtained in step 2) shows that there is an interlaced, tightly embedded structure of short columnar sodium aluminum pyroxene crystals and a dotted and reticulated structure, and exhibits a weak fluorescence morphology with clear outlines corresponding to the dotted and reticulated structure, then the jadeite is determined to be a natural A-grade old jadeite filled with crystalline wax. The dotted mesh structure includes capillaries that appear as scattered stars, a grid formed by crisscrossing non-directional relaxed boundaries, and directional ice crack patterns. If the jadeite sample exhibits ultraviolet fluorescence, and the microscopic image of the ultraviolet fluorescence luminescence characteristics obtained in step 2) shows a vein-like network lacking independent capillaries, and exhibits a blurred outline of the vein-like network and a strong fluorescent morphology in patches and clusters, then the jadeite is determined to be B-grade or B+C-grade jadeite filled with plastic resin.

2. The method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure according to claim 1, characterized in that, The old jadeite refers to old mine seed material that was hand-processed before 1958 and contains natural wax filling; the new jadeite refers to new mine mountain material that was processed with power tools after 1972 and has a glassy luster on the surface.

3. The method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure according to claim 1, characterized in that, In step 2), a microscopic image of the ultraviolet fluorescence emission characteristics of the jade sample can be obtained using an ultraviolet fluorescence microscope.

4. The method for determining the commercial attributes of jadeite based on in-situ microstructure according to claim 1, characterized in that, In step 2), a microscopic image of the ultraviolet fluorescence emission characteristics of the jade sample can be obtained by using a digital microscope and an ultraviolet flashlight.

5. The method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure according to claim 1, characterized in that, In step 2), ultraviolet light with a wavelength of 365 nm or 253.7 nm is used to obtain microscopic images of ultraviolet fluorescence emission characteristics.

6. The method for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure according to claim 5, characterized in that, In step 2), ultraviolet light with a wavelength of 365 nm is used to obtain a microscopic image of the ultraviolet fluorescence emission characteristics.

7. A system for determining the commercial attributes of jadeite based on ultraviolet fluorescence microstructure, characterized in that, The device includes modules for implementing the method according to any one of claims 1 to 6, the modules comprising an ultraviolet fluorescence microscopy image acquisition module, an image feature analysis module, and a comparison module; The ultraviolet fluorescence microscopic image acquisition module is used to acquire ultraviolet fluorescence microscopic images of jade. The analysis module is used to analyze the fluorescence morphology of ultraviolet fluorescence micrographs of jadeite and compare it with a standard jadeite structure database, thereby determining the commercial attributes of jadeite.

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