Colorful and bright diamond

Abstract

The present invention involves the field of jewellery products, and especially, relates to a colourful and bright diamond which comprises an even number of main crown facets and an even number of main pavilion facets. The colourful and bright diamond has a total reflection gross efficiency of two 90% and the optical performance which is 12 times more than the existing ordinary diamonds.

1 . A colourful and bright diamond, characterized in that:
 its shape and construction is “round seventy-four facets type of colourful and bright diamond”, comprising main crown facets ( 1 ) and main pavilion facets ( 2 ) provided, both in the number of 8 and each accounting for 88%˜92% of the area of its own portion;   one table facet ( 3 ) is provided at the top end of a crown portion, a plurality of crown star facets ( 4 ) are provided between the edge lines of the table facet and two neighbouring main crown facets ( 1 ), a crown arrow star facet ( 5 ) is provided from the bottom of the crown star facet ( 4 ) to between the two neighbouring main crown facets ( 1 ) above a girdle, and an upper girdle right star facet ( 6 ) and an upper girdle left star facet ( 7 ) are provided at two sides under the crown arrow star facet and above the girdle, respectively,   the numbers of the crown star facets ( 4 ), the crown arrow star facets ( 5 ), the upper girdle right star facets ( 6 ) and the upper girdle left star facets ( 7 ) are each 8, and the total area of them accounts for 8%˜12% of the area of the crown portion,   in a pavilion portion, a pavilion arrow star facet ( 8 ) is provided under the girdle between two main pavilion facets ( 2 ), with the height being half of that of the main pavilion facet ( 2 ); a lower girdle right star facet ( 9 ) and a lower girdle left star facet ( 10 ) are provided at two sides above the pavilion arrow star facet ( 8 ) and under the girdle, respectively; the numbers of the pavilion arrow star facets ( 8 ), the lower girdle right star facets ( 9 ) and the lower girdle left star facets ( 10 ) are each 8 and the total area of them accounts for 8%˜12% of the area of the pavilion portion; and a bottom tip star facet ( 11 ) is provided at the bottom end of the pavilion portion.   
     
     
         2 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the main crown facets ( 1 ) and the main pavilion facets are both provided in the number of 8, each accounting for 88%˜92% of the area of its own portion;   the angle between the main crown facet ( 1 ) and the plane of the girdle is of 37.5˜38.5 degrees; and the angle between the main pavilion facet ( 2 ) and the plane of the girdle is of 40.5˜41.5 degrees.   
     
     
         3 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the width of the table facet ( 3 ) is 55.5˜58.5% of the diameter of the girdle.   
     
     
         4 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the angle between the crown star facet ( 4 ) and the table facet ( 3 ) is of 12˜13 degrees.   
     
     
         5 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the angle between the crown arrow star facet ( 5 ) and the plane of the girdle is of 35˜37 degrees.   
     
     
         6 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the angle between the upper girdle right star facet ( 6 ) and the plane of the girdle and the angle between the upper girdle left star facet ( 7 ) and the plane of the girdle are both of 37˜40 degrees.   
     
     
         7 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the numbers of the crown star facets ( 4 ), the crown arrow star facets ( 5 ), the upper girdle right star facets ( 6 ) and the upper girdle left star facets ( 7 ) are each 8, and the total area of them accounts for 8%˜12% of the area of the crown portion.   
     
     
         8 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the angle between the pavilion arrow star facet ( 8 ) and the plane of the girdle is of 38˜40 degrees.   
     
     
         9 . The colourful and bright diamond according to  claim 8 , characterized in that:
 the angle between the lower girdle right star facet ( 9 ) and the plane of the girdle and the angle between the lower girdle left star facet ( 10 ) and the plane of the girdle are both of 40˜43 degrees.   
     
     
         10 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the numbers of the pavilion arrow star facets ( 8 ), the lower girdle right star facets ( 9 ) and the lower girdle left star facets ( 10 ) are each 8, and the total area of them accounts for 8%˜12% of the area of the pavilion portion.   
     
     
         11 . The colourful and bright diamond according to  claim 1 , characterized in that:
 the width of the bottom tip star facet ( 11 ) is 0.1˜2% of the diameter of the girdle.