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 by comprising an even number of main crown facets and an even number of main pavilion facets, wherein
 a plurality of first star facets are provided at a top portion of a crown portion and connected to the main crown facets, a second star facet is provided at the joint between two adjacent main crown facets and close to a girdle, and a first upper girdle star facet and a second upper girdle star facet are respectively provided at the joints between each second star facet and two adjacent main crown facets, and the numbers of the first star facets, the second star facets, the first upper girdle star facets and the second upper girdle star facets is the same with that of the main crown facets respectively; and   the main pavilion facet is, at the side distal from the girdle, connected with a bottom facet, a third star facet is provided at the joint between two adjacent main pavilion facets and close to the girdle, and a first lower girdle star facet and a second lower girdle star facet are respectively provided at the joints between each third star facet and two adjacent main pavilion facets, and the numbers of the third star facets, the first lower girdle star facets and the second lower girdle star facets is the same with that of the main pavilion facets respectively.   
     
     
         2 . The colourful and bright diamond according to  claim 1 , characterized in that the crown portion further comprises fourth star facets provided between the first star facets and the main crown facets. 
     
     
         3 . The colourful and bright diamond according to  claim 2 , characterized in that the crown portion comprises a table facet which is connected with the first star facets. 
     
     
         4 . The colourful and bright diamond according to  claim 1 , characterized in that the first star facets intersect one another at one point. 
     
     
         5 . The colourful and bright diamond according to  claim 1 , characterized in that the angle between the main crown facet and the plane in which the girdle is located is 36-38 degrees and the angle between the main pavilion facet and the plane in which the girdle is located is 39-40 degrees. 
     
     
         6 . The colourful and bright diamond according to  claim 1 , characterized in that the angle between the second star facet and the plane in which the girdle is located is 35-38 degrees and the angle between the third star facet and the plane in which the girdle is located is 37-39 degrees. 
     
     
         7 . The colourful and bright diamond according to  claim 1 , characterized in that the angle between the first upper girdle star facet and the plane in which the girdle is located and the angle between the second upper girdle star facet and the plane in which the girdle is located are 40-43 degrees, and the angle between the first lower girdle star facet and the plane in which the girdle is located and the angle between the second lower girdle star facet and the plane in which the girdle is located are 42-43 degrees. 
     
     
         8 . The colourful and bright diamond according to  claim 3 , characterized in that the angle between the first star facet and the table facet is 16-18 degrees and the angle between the fourth star facet and the table facet is 32-34 degrees. 
     
     
         9 . The colourful and bright diamond according to  claim 3 , characterized in that the width of the table facet is 55-58% of the diameter of the colourful and bright diamond, the height of the crown portion is 16-18% of the diameter of the colourful and bright diamond, the width of the girdle is 2-3% of the diameter of the colourful and bright diamond, the height of a pavilion portion is 42-44% of the diameter of the colourful and bright diamond, the diameter of the bottom facet is 1-2% of the diameter of the colourful and bright diamond, and the height of the colourful and bright diamond is 58-61% of the diameter of the colourful and bright diamond.