ROUND GEMSTONE CUT SHAPE PROVIDING A SPECIFIC OPTICAL PATTERN

• US 20120180525A1
• Filed: 01/14/2011
• Published: 07/19/2012
• Est. Priority Date: 01/14/2011
• Status: Active Grant

• Current Assignee: Jonathan Weingarten
• Original Assignee: Jonathan Weingarten
• Inventors: WEINGARTEN, Jonathan
• Granted Patent: US 8,844,319 B2
• Time in Patent Office: Days
• US Class Current: 63/32
• CPC Class Codes: A44C 17/001 Faceting gems

Abstract

A gemstone cut with a table facet, where the gemstone receives existing light from around the viewer and the facets on the bottom of the diamond effectively reflect the existing light back into the eyes of the beholder in such a manner as to maximize light performance, and to produce a unique and distinct look of light in the form of a flower with eight rounded pedals under the table facet which can be observed in natural ambient light.

Claims

1. A gemstone cut shape providing a specific optical pattern, the gemstone cut shape comprising:

a girdle portion having a girdle plane, said girdle portion having a substantially round cross sectional shape in said girdle plane;

a crown portion on one side of said girdle portion, said crown portion including, a table facet, and a plurality of crown facets arranged around said table facet;

a pavilion portion arranged on another side of said girdle portion diametrically opposite said crown portion, said pavilion portion including a plurality of pavilion facets tapering said pavilion portion together as the pavilion portion extends away from said girdle, said crown facets and said pavilion facets being arranged to provide an optical pattern under said table facet when observed in natural ambient light, said optical pattern having a flower-type shape with eight round shaped petals surrounding a round shaped center.

2. A gemstone cut shape in accordance with claim 1, wherein:

said girdle portion has a horizontal width;

said table facet has a width that is 47-51% of said width of said girdle portion.

3. A gemstone cut shape in accordance with claim 1, wherein:

said facets are arranged according to one of the “

brilliant cut”

style and the “

Old European Cut”

round style.

4. A gemstone cut shape in accordance with claim 1, wherein:

the gemstone cut shape is formed in diamond.

5. A gemstone cut shape in accordance with claim 1, wherein:

said crown facets include;

eight crown main facets arranged around said table facet and arranged at an angle between 35-36 degrees with respect to said girdle plane,

eight crown star facets arranged around said table facet and arranged at an angle between 22-25 degrees with respect to said girdle plane,

sixteen crown half facets arranged around said table facet and arranged at an angle between 38-42 degrees with respect to said girdle plane;

said pavilion facets include;

eight pavilion main facets arranged at an angle between 41-41.6 degrees with respect to said girdle plane,

sixteen pavilion half facets arranged at an angle between 42.7-44 degrees with respect to said girdle plane.

6. A gemstone cut shape in accordance with claim 5, wherein:

the gemstone cut shape is formed in diamond.

7. A gemstone cut shape in accordance with claim 5, wherein:

said crown star facets are arranged between said table facet and said crown main facets;

said crown half facets are arranged between said girdle portion and said crown main facets.

8. A gemstone cut shape providing a specific optical pattern, the gemstone cut shape

a girdle portion having a girdle plane, said girdle portion having a substantially round cross sectional shape in said girdle plane;

a crown portion on one side of said girdle portion, said crown portion including;

a table facet,

eight crown main facets arranged around said table facet and arranged at an angle between 35-36 degrees with respect to said girdle plane,

eight crown star facets arranged around said table facet and arranged at an angle between 22-25 degrees with respect to said girdle plane,

sixteen crown half facets arranged around said table facet and arranged at an angle between 38-42 degrees with respect to said girdle plane;

a pavilion portion arranged on another side of said girdle portion diametrically opposite said crown portion, said pavilion portion including;

eight pavilion main facets arranged at an angle between 41-41.6 degrees with respect to said girdle plane,

sixteen pavilion half facets arranged at an angle between 42.7-44 degrees with respect to said girdle plane.

9. A gemstone cut shape in accordance with claim 8, wherein:

said crown star facets are arranged between said table facet and said crown main facets;

said crown half facets are arranged between said girdle portion and said crown main facets.

10. A gemstone cut shape in accordance with claim 8, wherein:

said girdle portion has a width;

said table facet has a width that is 47-51% of said width of said girdle portion.

11. A gemstone cut shape in accordance with claim 8, wherein:

said crown portion includes another crown facet;

said pavilion portion includes another pavilion facet.

12. A gemstone cut shape in accordance with claim 8, wherein:

said facets are arranged according to one of the “

brilliant cut”

style and the “

Old European Cut”

round style.

13. A gemstone cut shape in accordance with claim 8, wherein:

the gemstone cut shape is formed in diamond.

14. A gemstone cut shape in accordance with claim 9, wherein:

said girdle portion has a width;

said table facet has a width that is 47-51% of said width of said girdle portion;

said crown portion includes another crown facet;

said pavilion portion includes another pavilion facet;

said facets are arranged according to one of the “

brilliant cut”

style and the “

Old European Cut”

round style;

the gemstone cut shape is formed in diamond.