GEMSTONE

Abstract

The invention relates to a gemstone including a crown having a multiplicity of crown facets and a table, a girdle, and a pavilion having a multiplicity of pavilion facets, wherein a crown angle is between 34.5 and 35.5, and is preferably 35, and a pavilion angle is between 40 and 41, preferably between 40.2 and 40.8, and is particularly preferably 40.5.

Claims

1. A gemstone, comprising: a crown having a multiplicity of crown facets and a table, a girdle, and a pavilion having a multiplicity of pavilion facets, wherein: a crown angle is between 34.5 and 35.5, and a pavilion angle is between 40 and 41.

2. The gemstone as claimed in claim 1, wherein the crown of the gemstone has one or two angle planes.

3. The gemstone as claimed in claim 1, wherein the table is a regular dodecagon.

4. The gemstone as claimed in claim 1, wherein the sum of the crown facets and of the pavilion facets is forty-eight or thirty-six or twenty-four facets.

5. The gemstone as claimed in claim 1, wherein the pavilion facets comprise lower girdle facets and the crown facets comprise upper girdle facets, wherein each of the lower girdle facets is aligned with precisely one of the upper girdle facets.

6. A timepiece having at least one gemstone, which is arranged in a dial/hands compartment or in a watchglass.

7. The gemstone as claimed in claim 1, wherein the crown angle is 35.

8. The gemstone as claimed in claim 1, wherein the pavilion angle is between 40.2 and 40.8.

9. The gemstone as claimed in claim 1, wherein the pavilion angle is 40. 5.

10. The gemstone as claimed in claim 2, wherein the table is a regular dodecagon.

11. The gemstone as claimed in claim 2, wherein the sum of the crown facets and of the pavilion facets is forty-eight or thirty-six or twenty-four facets.

12. The gemstone as claimed in claim 3, wherein the sum of the crown facets and of the pavilion facets is forty-eight or thirty-six or twenty-four facets.

13. The gemstone as claimed in claim 2, wherein the pavilion facets comprise lower girdle facets and the crown facets comprise upper girdle facets, wherein each of the lower girdle facets is aligned with precisely one of the upper girdle facets.

14. The gemstone as claimed in claim 3, wherein the pavilion facets comprise lower girdle facets and the crown facets comprise upper girdle facets, wherein each of the lower girdle facets is aligned with precisely one of the upper girdle facets.

15. The gemstone as claimed in claim 4, wherein the pavilion facets comprise lower girdle facets and the crown facets comprise upper girdle facets, wherein each of the lower girdle facets is aligned with precisely one of the upper girdle facets.

16. The timepiece according to claim 6, wherein the at least one gemstone comprises: a crown having a multiplicity of crown facets and a table; a girdle; and a pavilion having a multiplicity of pavilion facets, wherein a crown angle is between 34.5 and 35.5, and a pavilion angle is between 40 and 41.

Description

[0027] Further details, advantages and features of the present invention can be gathered from the following description of exemplary embodiments with reference to the drawing, in which identical, or functionally identical, parts are each denoted by the identical reference sign. In the drawing:

[0028] FIG. 1(a)-(d) show different views of a gemstone according to a first exemplary embodiment of the present invention,

[0029] FIG. 2(a)-(d) show different views of a gemstone according to a second exemplary embodiment of the present invention,

[0030] FIG. 3(a)-(e) show different views of the gemstone according to a third exemplary embodiment of the present invention,

[0031] FIG. 4(a)-(d) show different views of a gemstone according to a fourth exemplary embodiment of the present invention,

[0032] FIG. 5(a)-(d) show different views of a gemstone according to a fifth exemplary embodiment of the present invention, and

[0033] FIG. 6(a)-(d) show different views of a gemstone according to a sixth exemplary embodiment of the present invention.

[0034] A gemstone 1 according to a first exemplary embodiment of the present invention will be described in detail hereinbelow with reference to FIG. 1.

[0035] In particular, FIG. 1(a) shows a plan view, FIG. 1(b) shows a side view, and FIG. 1(c) shows a bottom view, of the gemstone 1. FIG. 1(d) shows a light pattern of the gemstone 1 seen from above under a kaleidoscope.

[0036] As can be seen from FIG. 1(b), the gemstone 1 has a crown 2, a girdle 3 and a pavilion 4.

[0037] A crown angle of the gemstone 1 is between 34.5 and 35.5, and is preferably 35. Furthermore, a pavilion angle of the gemstone 1 is between 40 and 41, preferably between 40.2 and 40.8, and is particularly preferably 40.5. In particular, the crown angle is 35 and the pavilion angle is 40.5.

[0038] The crown 2 comprises a table 10 and a multiplicity of crown facets 11, 12, wherein the pavilion 4 has a multiplicity of pavilion facets 13, 14. In particular, the crown facets 11, 12 comprise first crown facets 11 and second crown facets (upper girdle facets) 12. Furthermore, the pavilion facets 13, 14 comprise first pavilion facets (lower girdle facets) 13 and second pavilion facets 14.

[0039] The table 10 is preferably designed in the form of a regular dodecagon.

[0040] The first crown facets 11 each have a broad side adjoining the table 10, wherein the second crown facets 12 extend from the table 10 to the girdle 3 and have a broad side adjoining the girdle 3. This creates the shape of an internal star, as seen in the plan view of FIG. 1(a).

[0041] The first crown facets 11 are in the shape of a pentagon and the second crown facets 12 are in the shape of a triangle. The first pavilion facets 13 are in the shape of a triangle and the second pavilion facets 12 are in the shape of a pentagon.

[0042] In particular, this embodiment of the gemstone 1 has twelve such first crown facets 11 and twelve such second crown facets 12. Therefore, the gemstone 1 has a total of twenty-four crown facets.

[0043] The first pavilion facets 13 each have a broad side adjoining the table 10, wherein the second pavilion facets 14 extend from the table 10 to the girdle 3. In particular, this embodiment of the gemstone 1 has twelve such first pavilion facets 13 and twelve such second pavilion facets 14. Therefore, the gemstone 1 has a total of twenty-four pavilion facets.

[0044] The overall number of facets of the gemstone 1 is 49 facets (48 crown and pavilion facets plus the table 10).

[0045] The crown 2 of the gemstone 1 has two angle planes, wherein the one angle plane comprises the first crown facets 12 and the other angle plane comprises the second crown facets 13.

[0046] Correspondingly, the pavilion 3 has two angle planes, wherein the one angle plane comprises the first pavilion facets 13 and the other angle plane comprises the second pavilion facets 14.

[0047] The pavilion 2 tapers to a culet 5. The culet 5 is formed by the second pavilion facets 14.

[0048] Each of the second crown facets 12 is advantageously aligned with precisely one first pavilion facet 13.

[0049] FIG. 2 illustrates a gemstone 1 according to a second exemplary embodiment of the present invention.

[0050] In particular, FIG. 2(a) shows a plan view, FIG. 2(b) shows a side view, and FIG. 2(c) shows a bottom view, of the gemstone 1.

[0051] The second exemplary embodiment differs from the first exemplary embodiment basically in that the first crown facets 11 each have a broad side adjoining the table 10 and extend from the table 10 to the girdle 3. The second crown facets 12 each have a broad side adjoining the girdle 3.

[0052] Furthermore, the first crown facets 11 are each in the shape of a triangle and the second crown facets 12 are in the shape of a pentagon.

[0053] This creates the shape of an external star, as seen in the plan view of FIG. 2(a).

[0054] FIG. 2(d) shows a light pattern of the gemstone 1 as seen from above, when the gemstone 1 is viewed under a kaleidoscope.

[0055] FIG. 3 illustrates a gemstone 1 according to a third exemplary embodiment of the present invention.

[0056] In particular, FIG. 3(a) shows a plan view, FIG. 3(b) shows a side view, and FIG. 3(c) shows a bottom view, of the gemstone 1.

[0057] In this exemplary embodiment, the first crown facets 11 each have a broad side adjoining the table 10 and extend from the table 10 to the girdle 3, as in the second exemplary embodiment.

[0058] In the third exemplary embodiment, however, the second crown facets 12 each have a broad side adjoining the girdle 3 and extend from the table 10 to the girdle 3.

[0059] Therefore, both the first crown facets 11 and the second crown facets 12 extend from the table 10 to the girdle 3.

[0060] The first crown facets 11 and the second crown facets 12 are of triangular design.

[0061] This creates the shape of a full star, as seen in the plan view of FIG. 3(a).

[0062] In this exemplary embodiment, the crown facets 11, 12 form just a single angle plane in the crown 2 of the gemstone 1, since all the crown facets 11, 12 extend from the girdle 3 to the table 10. This means that all the crown facets 11, 12 are positioned at the same angle, which is equal to the crown angle.

[0063] FIGS. 3(d) and (e) show light patterns of the gemstone 1 as seen from above and beneath under a kaleidoscope.

[0064] FIG. 4 illustrates a gemstone 1 according to a fourth exemplary embodiment of the present invention.

[0065] In particular, FIG. 4(a) shows a plan view, FIG. 4(b) shows a side view, and FIG. 4(c) shows a bottom view, of the gemstone 1.

[0066] In this exemplary embodiment, the crown 2 just has a multiplicity of first crown facets 11. This means that the crown facets comprise only the first crown facets 11. The first crown facets 11 are each designed in the form of a quadrilateral and adjoin the table 10 and the girdle 2.

[0067] The gemstone 1 therefore has just a single angle plane in the crown 2.

[0068] The gemstone 1 has twelve crown facets, or twelve first crown facets 11, and twenty-four pavilion facets 13, 14.

[0069] The overall number of facets of the gemstone 1 is 37 facets (36 crown and pavilion facets plus the table 10).

[0070] Each of the first crown facets 11 is advantageously positioned opposite a first pavilion facet 13.

[0071] FIG. 4(d) shows a light pattern of the gemstone 1 as seen from above when the gemstone 1 is viewed under a kaleidoscope.

[0072] FIG. 5 shows a gemstone 1 according to a fifth exemplary embodiment of the present invention.

[0073] In particular, FIG. 5(a) shows a plan view, FIG. 5(b) shows a side view, and FIG. 5(c) shows a bottom view, of the gemstone 1.

[0074] The difference between the gemstone 1 according to the fifth exemplary embodiment and the gemstone 1 according to the fourth exemplary embodiment is that the first crown facets 11 in the fifth exemplary embodiment are offset in the circumferential direction, or in the direction of the girdle 3, in relation to the first pavilion facets 13.

[0075] As in the fourth exemplary embodiment, the gemstone 1 of FIG. 5 has a single angle plane in the crown 2.

[0076] FIG. 5(d) shows the resulting light pattern of the gemstone 1 as seen from above when the gemstone 1 is viewed under a kaleidoscope.

[0077] FIG. 6 illustrates a gemstone 1 according to a sixth exemplary embodiment of the present invention.

[0078] In the sixth exemplary embodiment, the crown 2 of the gemstone 1 corresponds in terms of construction to the crown 2 of the gemstone 1 according to the fourth exemplary embodiment.

[0079] In particular, FIG. 6(a) shows a plan view, FIG. 6(b) shows a side view, and FIG. 6(c) shows a bottom view, of the gemstone 1.

[0080] In the exemplary embodiment of FIG. 6, however, the pavilion 4 has just a single angle plane, which comprises a multiplicity of first pavilion facets 13. This means that the pavilion facets comprise only the first pavilion facets 13. In particular, the pavilion 4 has twelve pavilion facets, or twelve first pavilion facets.

[0081] The first pavilion facets 13 are each configured in the form of a triangle and extend from the culet 5 to the girdle 3. The first pavilion facets 13 here have a broad side adjoining the girdle 3.

[0082] It is also the case that the culet 5 is formed by the first pavilion facets 13.

[0083] The overall number of the facets of the gemstone 1 is 25 facets (24 crown and pavilion facets plus the table 10).

[0084] FIG. 6(d) shows the resulting light pattern of the gemstone 1 as seen from above when the gemstone 1 is viewed under a kaleidoscope.

[0085] The abovedescribed embodiments of the gemstone 1 have a large number of advantages at the same time.

[0086] In particular, the abovedescribed gemstones 1 reflect back into the viewer's eye a very high percentage of the light which is incident on them. It is also the case that the highest possible fraction of incident white light dispersed into the spectral colors can be reflected into the viewer's eye by the gemstones 1. Furthermore, a large fraction of the incident light is reflected as individual flashes of light in the case of the gemstones 1. This means that the gemstones 1 do not convert focused light into scattered, diffuse light. Furthermore, the gemstones 1 are designed such that they reflect the incident light to the viewer such that, when viewed from pretty much all positions (even at shallow angles), the gemstones are highly luminescent, exhibit dispersion and sparkle. Moreover, the gemstone 1 are optimized for use in a timepiece. This means that the gemstones 1, as far as their sparkle and dispersion behavior are concerned, have fewer, but for all that more pronounced, flashes of light, wherein the gemstones 1 sparkle, and emit dispersion clusters, even at flat viewing angles. Furthermore, the gemstones 1 according to the exemplary embodiments explained above give a harmonious impression which does not dominate the design. Finally, the gemstones 1 are kaleidoscope-compatible. This means that the gemstones 1 produce an esthetically pleasing and clearly evident light symbol when the gemstones 1 are viewed under a kaleidoscope.

[0087] In other words, the interplay of individual optimized optical features is optimized as far as the gemstones 1 described above are concerned.

[0088] Alongside the written description of the invention documented above, the disclosure of the invention is supplemented by reference hereby being made explicitly to the illustration thereof in FIGS. 1 to 6.

LIST OF REFERENCE SIGNS

[0089] 1 Gemstone [0090] 2 Crown [0091] 3 Girdle [0092] 4 Pavilion [0093] 5 Culet [0094] 10 Table [0095] 11 First crown facets [0096] 12 Second crown facets [0097] 13 First pavilion facets [0098] 14 Second pavilion facets [0099] Crown angle [0100] Pavilion angle