# US 8,769,987 B2 · Gemstone

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- Number: US 8,769,987 B2
- Document ID: US8769987B2
- Status: Granted
- Kind: B2
- Application number: 12/955,055
- Filed: 2010-11-29
- Published: 2011-06-23
- Granted: 2014-07-08
- Earliest claimed: 2009-12-01
- Assignees: Dimexon Diamonds, Ltd.
- Applicants: Paras Paresh Mehta
- Inventors: Paras Paresh Mehta
- Web page: https://patentgrep.com/patent/US8769987B2

## CPC

- B28D 5/00: Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor (working by grinding or polishing B24; for artistic purposes B44B)
- A44C 17/001: {Faceting gems}
- B28D: WORKING STONE OR STONE-LIKE MATERIALS
- A44C: PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS

## Abstract

The present invention relates to a gemstone comprising a girdle, a crown, and a pavilion. The crown has a table, ten star facets surrounding the table, ten bezel facets aligned between the star facets, and twenty upper girdle facets aligned between the bezel facets. The pavilion is provided with ten pavilion main facets, twenty pavilion hook facets aligned between the pavilion main facets, and ten pavilion star facets aligned between the pavilion hook facets.

## Claims

### Claim 1

A diamond, comprising:
a girdle;
a crown extending in a first direction from the girdle, the crown comprising:
a table,
ten star facets surrounding the table, and
ten bezel facets aligned between the star facets and twenty upper girdle facets aligned between the bezel facets; and
a pavilion extending in a second direction from the girdle, opposite the first direction, the pavilion consisting of:
ten pavilion main facets extending concentrically from a point of the pavilion distant from the girdle and formed at an angle between 40.75° and 41.50° relative to a plane parallel to a horizontal plane of the girdle,
twenty substantially triangular pavilion hook facets aligned between the pavilion main facets and formed at an angle between 41.50° and 42.25° relative to a plane parallel to a horizontal plane of the girdle, wherein each of the pavilion hook facets is adjacent to, and forms a common edge with another pavilion hook facet to form a pair of pavilion hook facets, and each of the pair of pavilion hook facets is aligned between two adjacent pavilion main facets, and
ten substantially triangular pavilion star facets aligned between the pavilion hook facets and formed at an angle between 45.75° and 46.50° relative to a plane parallel to a horizontal plane of the girdle, wherein the pavilion star facets are aligned around periphery of the pavilion and each pavilion star facet includes a first side forming a first common edge with a side of a first pavilion hook facet of the pair of pavilion hook facets and a second side forming a second common edge with a side of a second pavilion hook facet of the pair of pavilion hook facets.

### Claim 2 (depends on 1)

The gemstone according to claim 1, wherein the pavilion main facets are formed at an angle of 41°, relative to the plane parallel to the horizontal plane of the girdle.

### Claim 3 (depends on 1)

The gemstone according to claim 1, wherein the pavilion hook facets are formed at an angle of 41.75°, relative to the plane parallel to the horizontal plane of the girdle.

### Claim 4 (depends on 1)

The gemstone according to claim 1, wherein the pavilion star facets are formed at an angle of 46°, relative to the plane parallel to the horizontal plane of the girdle.

### Claim 5 (depends on 1)

The gemstone according to claim 1, wherein the pavilion main facets are formed at an angle of 41°, the pavilion hook facets are formed at an angle of 41.75° and the pavilion star facets are formed at an angle of 46°, relative to the plane parallel to the horizontal plane of the girdle.

### Claim 6 (depends on 1)

The gemstone according to claim 1, wherein each of the upper girdle facets is aligned adjacent to, and forming a common edge with another upper girdle facet to form a pair of upper girdle facets, each of the pair of upper girdle facets is aligned between two adjacent bezel facets.

### Claim 7 (depends on 6)

The gemstone according to claim 6, wherein a projection of ten heart shapes, ten arrow shapes and a floral pattern are observed when the gemstone is exposed to light.

### Claim 8 (depends on 1)

The gemstone according to claim 1, wherein each of the ten bezel facets extends from the table to the girdle.

### Claim 9 (depends on 8)

The gemstone according to claim 8, wherein each of the ten bezel facets is in a shape of a four-sided kite.