Fixing structure and jewelry

Abstract

To provide a fixing structure for jewelry capable of preventing damage to and falling of the jewelry, and jewelry.SOLUTION: A fixing structure comprises a base for fixing jewelry, and a bridging part. The base includes a fixing part and a pillar part, where the fixing part includes a plurality of prongs for supporting and fixing an edge of the jewelry from a lateral side, and the pillar part is set to be higher than the prongs in the fixing part and includes a first pillar provided on a right side of the fixing part, and a second pillar provided on the left side of the fixing part. The bridging part is provided to connect an upper end of the first pillar and an upper end of the second pillar, where a space is formed between a lower end of the bridging part and the upper ends of the prongs in the fixing part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fastening structure and a piece of jewelry, and in particular to a fastening structure for a gemstone in a piece of jewelry and to a piece of jewelry having said fastening structure. [Background technology]

[0002] Various types of jewelry using gemstones are known. In such jewelry, as disclosed in Patent Document 1, for example, the gemstone is fixed by a head portion having a gemstone holding portion, a culette support, a claw body, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-144243 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional jewelry, the jewel is fixed in place while being exposed from the head portion. However, when the jewel is fixed in place while being exposed in this manner, the jewel may be damaged or fall off from the head portion due to an external impact.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide a fixing structure for a jewel in a piece of jewelry that can prevent damage to or falling off of the jewel, and a piece of jewelry having such a fixing structure. [Means for solving the problem]

[0006] In order to solve the above problems, the fixing structure of the present invention is a fixing structure for a gem in a piece of jewelry, comprising a base and a hanging portion for fixing the gem, the base having a fixing portion and a pillar portion, the fixing portion having a plurality of claw portions for supporting and fixing an end of the gem on the side, the pillar portion being set higher than the claw portions in the fixing portion, the pillar portion having a first pillar portion provided on the right side of the fixing portion and a second pillar portion provided on the left side of the fixing portion, the hanging portion being provided to bridge and connect the upper end of the first pillar portion and the upper end of the second pillar portion, and a space being formed between the lower end of the hanging portion and the upper end of the claw portion in the fixing portion.

[0007] According to the present invention, the pillars are set higher than the claws of the fixed part, and have a first pillar provided on the right side of the fixed part and a second pillar provided on the left side of the fixed part, the bridging part is provided to bridge and connect the upper end of the first pillar and the upper end of the second pillar, and a space is formed between the lower end of the bridging part and the upper end of the claws of the fixed part, so that when the jewel is fixed to the fixed part, the bridging part protects the jewel from external impact and prevents damage to the jewel. Also, because a space is formed between the lower end of the bridging part and the upper end of the claws of the fixed part, the lower end of the bridging part and the upper end of the claws are less likely to come into contact with each other, and damage and wear to the claws can be prevented. This prevents the jewel from falling off the claws.

[0008] When the jewel is fixed to the fixing part, a space is formed between the lower end of the bridging part and the upper end of the jewel, so that the lower end of the bridging part and the upper end of the jewel rarely come into contact with each other, preventing damage and wear of the jewel. Also, since the upper end of the jewel is located below the lower end of the bridging part, a unique aesthetic feeling can be provided.

[0009] The base has a recess into which the lower side of the jewel is fitted and fixed inside the multiple claws of the fixing part, so that the fixing part and the recess work together to fix the jewel.

[0010] The claw portion is shaped like an elliptical cylinder, and by supporting and fixing the end of the jewel on the side of the long end of the elliptical cylinder shape, the end of the jewel can be supported by the side portion of the claw portion with the greater curvature, and the end of the jewel can be supported and securely fixed by being supported by the portion with the greater surface pressure. The claw portion has a recess on the side surface into which the end of the jewel is fitted to fix it, thereby preventing the jewel from falling off the claw portion.

[0011] The claw portion is configured by arranging a first claw portion through a fourth claw portion in a rectangular shape, and the first claw portion and the second claw portion, and the third claw portion and the fourth claw portion are arranged side by side in the left-right direction at a predetermined interval, and the first claw portion and the third claw portion, and the second claw portion and the fourth claw portion are arranged side by side in the front-to-back direction at a predetermined interval, thereby supporting and fixing the edge of the jewel from four directions.

[0012] The two first pillars are provided on the right side of the fixed portion, and the two second pillars are provided on the left side of the fixed portion, one of the two first pillars and one of the two second pillars are provided on the left and right sides along the installation direction of the first claw portion and the second claw portion, and the other of the two first pillars and the other of the two second pillars are provided on the left and right sides along the installation direction of the third claw portion and the fourth claw portion.

[0013] In other words, the hanging portion has a first hanging portion and a second hanging portion, the first hanging portion is arranged to hang and connect between the upper end of the one first pillar portion and the upper end of the one second pillar portion, and the second hanging portion is arranged to hang and connect between the upper end of the other first pillar portion and the upper end of the other second pillar portion, and since the first claw portion to the fourth claw portion of the fixing portion are blocked from view from the outside when viewed from above, the state in which the claw portions are supporting the ends of the gemstones cannot be seen from the outside, providing a unique aesthetic feel.

[0014] The width dimension of the pillar portion and the bridging portion is greater than the width dimension of the claw portion of the fixing portion, so that the claw portion can be reliably blocked from view from outside.

[0015] Laser processing can be performed on joints between the bridge portion, the fixed portion, and the column portion. The bridge portion may be formed in a rectangular shape. The rectangular wire may be a rectangular wire. The base and the bridge portion may be formed using a precious metal. The precious metal may be gold or platinum. The gemstones may be diamonds, emeralds, sapphires, rubies, and pearls.

[0016] In order to solve the above problems, the jewelry according to the present invention is characterized by having the fixing structure described above. The jewelry may be a ring, a necklace, a bracelet, a pierced earring, or an earring. Effect of the Invention

[0017] As described above, according to the present invention, damage to or falling off of jewels can be prevented. [Brief description of the drawings]

[0018] [Figure 1]FIG. 1 is a front view showing a configuration of a jewelry item according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a rear view showing a configuration of a jewelry item according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a plan view showing a configuration of a jewelry item according to an embodiment of the present invention. [Figure 4] FIG. 2 is a bottom view showing a configuration of a jewelry item according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a right side view showing the configuration of a jewelry item according to an embodiment of the present invention. [Figure 6] FIG. 2 is a left side view showing the configuration of a jewelry item according to an embodiment of the present invention. [Figure 7] FIG. 1 is a perspective view showing a configuration of a jewelry item according to an embodiment of the present invention. [Figure 8] 4 is an enlarged plan view showing the configuration inside AA in FIG. 3 in a jewelry item according to an embodiment of the present invention. [Figure 9] 9 is an enlarged plan view showing a configuration of the jewelry according to the embodiment of the present invention in the state shown in FIG. 8 with the bridging portion removed. [Figure 10] 10 is an enlarged plan view showing the configuration of the jewelry according to the embodiment of the present invention after removing the jewelry from the state shown in FIG. 9. [Figure 11] FIG. 4 is a front cross-sectional view of the jewelry according to the embodiment of the present invention shown in FIG. [Figure 12] 12 is an enlarged front view showing the configuration of the inside of CC in FIG. 11 in the jewelry according to the embodiment of the present invention. [Figure 13] 13 is an enlarged front view showing the configuration of the jewelry according to the embodiment of the present invention with the jewel removed from the state shown in FIG. 12. [Figure 14] FIG. 4 is a cross-sectional view of the jewelry according to the embodiment of the present invention taken from the right side of FIG. [Figure 15] FIG. 15 is an enlarged right side view showing the configuration of the inside of the EE of FIG. 14 in the jewelry according to an embodiment of the present invention. [Figure 16] 16 is an enlarged right side view showing the configuration of the jewelry according to the embodiment of the present invention with the jewel removed from the state shown in FIG. 15. [Figure 17]17 is an enlarged right side view showing the configuration of the jewelry according to the embodiment of the present invention with the bridging portion removed from the state shown in FIG. 16. [Figure 18] FIG. 18 is an enlarged right side view showing the configuration of the jewelry according to the embodiment of the present invention with jewels set in it from the state shown in FIG. 17. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a front view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 2 is a rear view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 3 is a plan view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 4 is a bottom view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 5 is a right side view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 6 is a left side view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 7 is a perspective view showing the configuration of a jewelry according to an embodiment of the present invention, Fig. 8 is an enlarged plan view showing the configuration inside AA in Fig. 3 in the jewelry according to an embodiment of the present invention, Fig. 9 is an enlarged plan view showing the configuration of the jewelry according to an embodiment of the present invention with the bridging part removed from the state of Fig. 8, Fig. 10 is an enlarged plan view showing the configuration of the jewelry according to an embodiment of the present invention with the jewel removed from the state of Fig. 9, Fig. 11 is an enlarged plan view showing the configuration of the jewelry according to an embodiment of the present invention with the jewel removed from the state of Fig. Fig. 12 is an enlarged front view showing the inner configuration of CC in Fig. 11 in the jewelry according to the embodiment of the present invention, Fig. 13 is an enlarged front view showing the configuration of the jewelry according to the embodiment of the present invention with the jewel removed from the state of Fig. 12, Fig. 14 is a right side cross-sectional view of DD in Fig. 3 in the jewelry according to the embodiment of the present invention, Fig. 15 is an enlarged right side view showing the inner configuration of EE in Fig. 14 in the jewelry according to the embodiment of the present invention, Fig. 16 is an enlarged right side view showing the configuration of the jewelry according to the embodiment of the present invention with the jewel removed from the state of Fig. 15, Fig. 17 is an enlarged right side view showing the configuration of the jewelry according to the embodiment of the present invention with the bridging part removed from the state of Fig. 16, Fig. 18 is an enlarged right side view showing the configuration of the jewelry according to the embodiment of the present invention with the jewel set in the state of Fig. 17. Note that each direction in the following description will be clearly indicated in the figures.

[0020] 1 to 12, the configuration of a jewelry 100 having a fixing structure 1 for a jewel 120 according to an embodiment of the present invention will be described. The jewelry 100 is, for example, a ring, and has a ring-shaped finger insertion section 110 for inserting a finger, and has the fixing structure 1 of the present invention on the upper part of the finger insertion section 110. The jewelry 100 can be various jewelry 100 such as a ring, a necklace, a bracelet, a pierced earring, or an earring. The fixing structure 1 for a jewel 120 of the present invention can also be used for jewelry 100 such as a necklace, a bracelet, a pierced earring, or an earring. The jewel 120 can be a diamond, an emerald, a sapphire, a ruby, a pearl, or the like.

[0021] The fixing structure 1 is a fixing structure 1 for fixing a jewel 120 in a jewelry item 100, and has a base 10 and a suspending portion 20 for fixing the jewel 120.

[0022] The base 10 has a base portion 15, a fixed portion 30, and a column portion 40, and the fixed portion 30 has a number of claw portions 31 that support and fix the side end portion 120A of the jewel 120 on the side surface 31' side. The claw portions 31 are formed in a columnar shape and are provided so as to protrude upward from the base portion 15.

[0023] The pillar portion 40 is formed in a pillar shape and is provided so as to protrude upward from the base portion 15. The pillar portion 40 is set to be taller than the claw portions 31 of the fixed portion 30. The pillar portion 40 has first pillar portions 41A, 41B provided on the right side of the fixed portion 30 and second pillar portions 42A, 42B provided on the left side of the fixed portion 40.

[0024] The bridging portion 20 is provided to bridge and connect the upper ends 41A', 41B' of the first pillar portions 41A, 41B and the upper ends 42A', 42B' of the second pillar portions 42A, 42B. A space 50 is formed between the lower end 20A of the bridging portion 20 and the upper end 31'' of the claw portion 31 of the fixed portion 30. In other words, the lower end 20A of the bridging portion 20 and the upper end 31'' of the claw portion 31 of the fixed portion 30 are spaced apart by a predetermined distance.

[0025] Furthermore, in the fixing structure 1, when the jewel 120 is fixed to the fixing part 30, a space 60 is also formed between the lower end 20A of the suspending part 20 and the upper end 120B of the jewel 120. In other words, when the jewel 120 is fixed to the fixing part 30, the lower end 20A of the suspending part 20 and the upper end 120B of the jewel 120 are spaced apart by a predetermined distance.

[0026] The base 10 has a recess 70 in which the lower side of the jewel 120 is fitted and fixed inside the multiple claws 31 of the fixing part 30. The base 10 is made of a precious metal. The precious metal forming the base 10 can be, for example, gold, silver, or platinum.

[0027] The claw portion 31 is shaped like an elliptical cylinder, and can support and fix the end 120A of the jewel 120 with the elliptical curved surface on the side surface 31' of the end 31a on the long side of the elliptical cylinder. The claw portion 31 also has a recess 31b on the side surface 31' into which the end 120A of the jewel 120 is fitted and fixed.

[0028] The claw portion 31 is configured by arranging the first claw portion 31A to the fourth claw portion 31D in a rectangular shape. The first claw portion 31A and the second claw portion 31B, and the third claw portion 31C and the fourth claw portion 31D are arranged side by side in the left-right direction at a predetermined interval. The first claw portion 31A and the third claw portion 31C, and the second claw portion 31B and the fourth claw portion 31D are arranged side by side in the front-rear direction at a predetermined interval. The end portion 120A of the jewel 120 can be supported and fixed by the elliptical curved surface on the side surface 31' of the elliptical cylindrical shape of the first claw portion 31A to the fourth claw portion 31D. In addition, a space 50 is formed between the lower end 20A of the bridging portion 20 and the upper end 31'' of the first claw portion 31A to the fourth claw portion 31D in the fixing portion 30.

[0029] Two first pillars 41A, 41B are provided on the right side of the fixed part 30. Two second pillars 42A, 42B are provided on the left side of the fixed part 30. One 41A of the two first pillars 41A, 41B and one 42A of the two second pillars 42A, 42B are provided on the left and right sides along the installation direction of the first claw part 31A and the second claw part 31B. The other 41B of the two first pillars 41A, 41B and the other 42B of the two second pillars 42A, 42B are provided on the left and right sides along the installation direction of the third claw part 31C and the fourth claw part 31D.

[0030] The bridging portion 20 has a first bridging portion 21 and a second bridging portion 22. The first bridging portion 21 is provided to bridge and connect the upper end 41' of one of the first pillar portions 41A and the upper end 42' of one of the second pillar portions 42A. The second bridging portion 22 is provided to bridge and connect the upper end 41' of the other first pillar portion 41B and the upper end 42' of the other second pillar portion 42B. By providing the bridging portion 20, the first claw portion 31A to the second claw portion 31D of the fixing portion 30 are not visible from the outside when viewed from above. The bridging portion 20 is formed using a precious metal. The precious metal can be, for example, gold, silver, or platinum.

[0031] The widths of the pillars 41A, 41B, 42A, 42B and the hanging parts 21, 22 are larger than the widths of the claw parts 31A to 31D of the fixed part 30. Laser processing is performed on the joints between the hanging parts 21, 22 and the fixed part 30 and the pillars 41A, 41B, 42A, 42B.

[0032] The jewelry item 100 constructed in this manner can be formed as follows. That is, the base 10 having the first claw portion 31A to the fourth claw portion 31D, the first pillar portions 41A and 41B, the second pillar portions 42A and 42B, and the recessed portion 70 is prepared (FIG. 17).

[0033] Next, the jewel 120 is fitted into the recess 70 while the end 120A of the jewel 120 is supported and fixed by the elliptical curved surface on the side surface 31' of the end 31a on the longer side of the elliptical cylindrical first to fourth claws 31A to 31D. More specifically, the end 120A of the jewel 120 is fitted into the recess 31b on the side surface 31' of the claw 31 and fixed (FIG. 18).

[0034] Next, the first bridging portion 21 is provided to bridge and connect the upper end 41' of one of the first pillar portions 41A and the upper end 42' of one of the second pillar portions 42A. Also, the second bridging portion 22 is provided to bridge and connect the upper end 41' of the other first pillar portion 41B and the upper end 42' of the other second pillar portion 42B (FIG. 15).

[0035] As described above, according to the present invention, the pillar portion 40 is set to be taller than the claw portion 31 in the fixed portion 30, and has a first pillar portion 41A, 41B provided on the right side of the fixed portion 30, and a second pillar portion 42A, 42B provided on the left side of the fixed portion 30, and the hanging portion 20 is provided to span and connect the upper ends 41' of the first pillar portions 41A, 41B and the upper ends 42' of the second pillar portions 42A, 42B, and a space is formed between the lower end 20A of the hanging portion 20 and the upper end 31' of the claw portion 31 in the fixed portion 30, so that when the jewel 120 is fixed to the fixed portion 30, the hanging portion 20 protects the jewel 120 from external impacts and prevents damage to the jewel 120. In addition, by forming a space 50 between the lower end 20A of the hanging part 20 and the upper end 31' of the claw part 31 of the fixing part 30, the lower end 20A of the hanging part 20 and the upper end 31' of the claw part 31 rarely come into contact with each other, which can prevent damage and wear of the claw part 31. This can prevent the jewel 120 from falling off the claw part 31.

[0036] In addition, when the jewel 120 is fixed to the fixing part 30, a space 60 is formed between the lower end 20A of the hanging part 20 and the upper end 120A of the jewel 120, so that the lower end 20A of the hanging part 20 and the upper end 120A of the jewel 120 rarely come into contact with each other, preventing damage and wear of the jewel 120. In addition, since the upper end 120A of the jewel 120 is located below the lower end 20A of the hanging part 20, a unique aesthetic feeling can be provided.

[0037] Furthermore, the base 10 has a recess 70 into which the jewel 120 is fitted and fixed inside the multiple claws 31 of the fixing part 30, so that the fixing part 30 and the recess 70 work together to fix the jewel 120.

[0038] Furthermore, by making the claw portion 31 shaped like an elliptical cylinder and supporting and fixing the end 120A of the jewel 120 on the side 31' on the end 31a side of the long side of the elliptical cylinder shape, the end 120A of the jewel 120 can be supported by the part of the claw portion 31 on the side 31' side with the greater curvature, and the end 120A of the jewel 120 can be supported and securely fixed by the part with the greater surface pressure. Furthermore, the claw portion 31 has a recess 31b on the side surface 31' into which the end 120A of the jewel 120 is fitted to be fixed, thereby preventing the jewel 120 from falling off the claw portion 31.

[0039] Furthermore, the claw portion 31 is configured by arranging the first claw portion 31A to the fourth claw portion 31D in a rectangular shape, and the first claw portion 31A, the second claw portion 31B, and the third claw portion 31C, and the fourth claw portion 31D are arranged side by side in the left-right direction at a predetermined interval, while the first claw portion 31A, the third claw portion 31C, and the second claw portion 31B, and the fourth claw portion 31D are arranged side by side in the front-to-back direction at a predetermined interval, thereby supporting and fixing the end portion 120A of the jewel 120 from four directions.

[0040] In addition, the hanging portion 20 has a first hanging portion 21 and a second hanging portion 22, and the first hanging portion 21 is arranged to span and connect the upper end 41' of one first pillar portion 41A and the upper end 42' of one second pillar portion 42A, and the second hanging portion 22 is arranged to span and connect the upper end 41' of the other first pillar portion 41B and the upper end 42' of the other second pillar portion 42B.Since the view from the outside of the first claw portion 31A to the fourth claw portion 31D of the fixing portion 30 is blocked when viewed from above, the state in which the claw portion 31 is supporting the end portion 120A of the jewel 120 cannot be seen from the outside, providing a unique aesthetic feeling.

[0041] Furthermore, the width dimension of the pillar portion 41 and the bridging portion 20 is greater than the width dimension of the claw portion 31 of the fixing portion 30, so that the claw portion 31 can be reliably blocked from view from the outside.

[0042] It is needless to say that the present invention is not limited to the above-described embodiment, and various modifications and applications are possible. [Explanation of symbols]

[0043] 1: Fixed structure 10: Foundation 15: Base 20: Handover section 21: First transfer section 22: Second crossover section 20A: Bottom end 30: Fixed part 31: Claw part 31a: Long end 31b: Recess 31´:Side 31´´:Top edge 31A: 1st claw part 31B: 2nd claw part 31C: 3rd claw part 31D: 4th claw part 40: Pillar part 41A, 41B: 1st pillar part 41´:Top end 42A, 42B: 2nd pillar part 42´:Top edge 50: Space 60: Space 70: Hole 100:Jewelry 110: Finger insertion part 120: Jewelry 120A: Side end 120B: Upper end

Claims

1. A structure for fixing a gemstone in a piece of jewelry, comprising: The jewelry has a base and a suspending portion for fixing the jewel, and the base has a fixing portion and a column portion, The fixing portion has a plurality of claw portions that support and fix the end portion of the jewel on the side surface, The pillar portion is set to be higher than the claw portion of the fixing portion, and includes a first pillar portion provided on the right side of the fixing portion and a second pillar portion provided on the left side of the fixing portion, The bridge portion is provided to bridge and connect between the upper end of the first pillar portion and the upper end of the second pillar portion, A fixing structure, characterized in that a space is formed between a lower end of the bridge portion and an upper end of the claw portion of the fixing portion.

2. 2. The fixing structure according to claim 1, wherein when the jewel is fixed to the fixing part, a space is formed between the lower end of the bridge part and the upper end of the jewel.

3. 2. The fixing structure according to claim 1, wherein the base has a recess into which a lower side of the jewel is fitted and fixed inside the plurality of claws of the fixing part.

4. 2. The fixing structure according to claim 1, wherein the claw portion is shaped like an elliptical cylinder, and the end of the jewel is supported and fixed by a side surface on the end side of the long side of the elliptical cylinder.

5. 2. The fixing structure according to claim 1, wherein the claw portion has a recess on the side surface into which an end of the jewel is fitted to fix the jewel.

6. The fixing structure described in claim 1, characterized in that the claw portion is configured by arranging a first claw portion to a fourth claw portion in a rectangular shape, and the first claw portion and the second claw portion, and the third claw portion and the fourth claw portion are arranged side by side in the left-right direction at a predetermined interval, and the first claw portion and the third claw portion, and the second claw portion and the fourth claw portion are arranged side by side in the front-to-back direction at a predetermined interval.

7. The fixing structure described in claim 1, characterized in that two of the first pillars are provided on the right side of the fixed portion, and two of the second pillars are provided on the left side of the fixed portion, one of the two first pillars and one of the two second pillars are provided on the left and right sides along the installation direction of the first claw portion and the second claw portion, and the other of the two first pillars and the other of the two second pillars are provided on the left and right sides along the installation direction of the third claw portion and the fourth claw portion.

8. The fixing structure according to claim 1, characterized in that the hanging portion has a first hanging portion and a second hanging portion, the first hanging portion is arranged to hang and connect between an upper end of the one first pillar portion and an upper end of the one second pillar portion, and the second hanging portion is arranged to hang and connect between an upper end of the other first pillar portion and an upper end of the other second pillar portion, and a view from outside of the first claw portion to the fourth claw portion of the fixing portion is blocked when viewed from above.

9. 2. The fixing structure according to claim 1, wherein the width of the post portion and the bridging portion is greater than the width of the claw portion of the fixing portion.

10. 2. The fixing structure according to claim 1, wherein a laser process is performed on joints between the bridge portion, the fixing portion, and the column portion.

11. The fixing structure according to claim 1 , wherein the bridge portion is formed in an angular linear shape.

12. The fixing structure according to claim 11, wherein the rectangular wire is a rectangular wire.

13. The fixing structure according to claim 1 , wherein the base and the bridge portion are formed using a precious metal.

14. 2. The fixing structure according to claim 1, wherein the precious metal is gold or platinum.

15. 2. The fixing structure according to claim 1, wherein the gemstone is a diamond, an emerald, a sapphire, a ruby, or a pearl.

16. An article of jewellery comprising a fastening structure according to any one of claims 1 to 15.

17. 17. The item of jewellery according to claim 16, characterized in that it is a ring, a necklace, a bracelet, a pierced earring or an earring.

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