Engraving method and pattern for increasing brilliance of flat cut gemstone

Abstract

A method for creating an inexpensive diamond with good optical and light qualities. The method includes cutting the diamond with a girdle diameter and a plurality of pavilion main facets, and a total height that is about 25% to 40% of the girdle width, and forming a series of parallel lines into at least one of the pavilion main facets. The resulting gemstone has a plurality of pavilion main facets, the gemstone having a total height that is about 25% to 40% of the girdle diameter, and a polygon shape formed into at least some of the pavilion main facets or pavilion girdle facets. In another embodiment, a gemstone has a girdle having a width, a pavilion portion with a plurality of pavilion main facets and a plurality of girdle lower facets, and a polygon shape etched into at least some of the pavilion main facets and girdle lower facets.

What is claimed is: 
     
         1 . A method for creating an inexpensive diamond with good optical and light qualities, the method comprising:
 cutting the diamond with a girdle diameter and a plurality of pavilion main facets, and a total height that is about 25% to 40% of the girdle diameter; and   forming a polygon shape into at least some of the pavilion main facets.   
     
     
         2 . A method as recited in  claim 1  further comprising forming the polygon shape by use of a chemical etching process. 
     
     
         3 . A method as recited in  claim 1  wherein at least some of the polygon shapes formed in the pavilion main facets are formed in a shape that has opposing sides. 
     
     
         4 . A method as recited in  claim 1  wherein the cut diamond is formed with a total height that is about 35% of the girdle diameter. 
     
     
         5 . A method for creating an inexpensive diamond with good optical and light qualities, the method comprising:
 cutting the diamond with a girdle diameter and a plurality of pavilion main facets, and a total height that is about 25% to 40% of the girdle diameter; and   forming a series of substantially parallel lines into at least one of the pavilion main facets.   
     
     
         6 . A method as recited in  claim 5  wherein the parallel lines are used to form polygons. 
     
     
         7 . A method as recited in  claim 5  wherein the cut diamond is formed with a total height that is about 35% of the girdle diameter. 
     
     
         8 . A gemstone having:
 a girdle of a predetermined diameter;   a plurality of pavilion main facets;   the gemstone having a total height that is about 25% to 40% of the girdle diameter; and   a polygon shape formed into at least some of the pavilion main facets or pavilion girdle facets.   
     
     
         9 . A gemstone as recited in  claim 8  wherein the polygon shape is formed as a result of a chemical etching process. 
     
     
         10 . A gemstone as recited in  claim 8  wherein at least some of the polygon shapes in the pavilion main facets are of a shape that has opposing sides, and are of a size such that the distance between opposing sides is about 1700 microns. 
     
     
         11 . A gemstone as recited in  claim 8  wherein the gemstone has a total height that is about 35% of the girdle diameter. 
     
     
         12 . A gemstone as recited in  claim 8  further comprising a crown portion with a height that is about 5% of the girdle diameter. 
     
     
         13 . A gemstone as recited in  claim 12  further comprising a table facet having has a width that is about 83.5% of the girdle diameter. 
     
     
         14 . A gemstone having:
 a girdle having a diameter;   a plurality of pavilion main facets and a plurality of girdle lower facets;   the gemstone having a total height that is about 25% to 40% of the girdle diameter; and   a geometric pattern etched into at least some of the pavilion main facets and at least some of the girdle lower facets.   
     
     
         15 . A gemstone as recited in  claim 14  wherein the total height of the gemstone is about 35% of the girdle diameter. 
     
     
         16 . A gemstone as recited in  claim 14  wherein eight polygons are formed in a strip on at least one of the pavilion main facets. 
     
     
         17 . A gemstone as recited in  claim 14  wherein the geometric pattern includes a series of substantially parallel lines, each about 1-2 microns wide, and spaced about 1-4 microns apart from adjacent lines. 
     
     
         18 . A gemstone as recited in  claim 14  wherein the pavilion main facets are part of a pavilion portion, and wherein the girdle exists in a plane, and wherein the pavilion main facets form an angle with the plane of the girdle that is about 28-30 degrees. 
     
     
         19 . A gemstone as recited in  claim 18  further comprising a crown portion having crown facets, and wherein the crown facets form an angle with the plane of the girdle that is about 28 degrees. 
     
     
         20 . A gemstone having:
 a girdle having a width;   a pavilion portion with a plurality of pavilion main facets and a plurality of girdle lower facets; and   a polygon shape etched into at least some of the pavilion main facets and girdle lower facets.   
     
     
         21 . A gemstone as recited in  claim 20  having a height that is no more than 40% of the girdle width. 
     
     
         22 . A gemstone as recited in  claim 21  having a crown portion that has a height that is within a range of 3% to 7% of the girdle width. 
     
     
         23 . A gemstone as recited in  claim 22  wherein the pavilion portion has a height that is within a range of 27% to 28% of the girdle width. 
     
     
         24 . A gemstone as recited in  claim 23  having a table facet that has a width that is within a range of 79% to 88% of the girdle width. 
     
     
         25 . A cut diamond comprising:
 a girdle portion having a girdle plane, the girdle portion having a substantially round shape;   a crown portion on one side of the girdle portion, the crown portion including:
 a table facet having eight sides, the table facet having an octagonal shape, 
 eight crown facets arranged around the table facet and having three sides, each one of the eight crown facets having one side arranged adjacent to one of the eight sides of the table facet and arranged at an angle between 16-30 degrees with respect to the girdle plane, 
 eight upper girdle facets arranged around the table facet and having three sides, each one of the upper girdle facets having one side arranged adjacent to the girdle, and having the other two sides adjacent to adjacent crown facets; and 
   a pavilion portion arranged on another side of the girdle portion diametrically opposite the crown portion and having a culet, the pavilion portion tapering inward towards the culet as the pavilion portion extends away from the girdle plane, the pavilion portion including:
 sixteen girdle lower facets, each having a triangular shape with three sides and extending part way toward the culet and each terminating in a point, short of the culet, one side of each of the sixteen girdle lower facets arranged adjacent the girdle portion; and 
 eight pavilion main facets, each having four sides, and each one of the eight pavilion main facets arranged between two pairs of the sixteen girdle lower facets, each one of the eight pavilion main facets arranged at an angle between 28-30 degrees with respect to the girdle plane. 
   
     
     
         26 . A cut diamond as recited in  claim 25  wherein the girdle portion has a width, and the cut diamond has a height that is no more than 40% of the girdle width. 
     
     
         27 . A cut diamond as recited in  claim 26  further comprising a culet facet formed at the culet. 
     
     
         28 . A cut diamond as recited in  claim 27  wherein the crown portion has a height that is within a range of 3% to 7% of the girdle width. 
     
     
         29 . A cut diamond as recited in  claim 28  wherein the pavilion portion has a height that is within a range of 27% to 28% of the girdle width. 
     
     
         30 . A cut diamond as recited in  claim 29  wherein the table facet has a width that is within a range of 79% to 88% of the girdle width.