A diamond with eighty-one facets having a ten hearts and ten arrows inner structure

Abstract

The present invention relates to a diamond with eighty-one facets having a ten hearts and ten arrows inner structure, it includes ten main crown facets and ten main pavilion facets; said diamond also has one table facet; crown star facets are provided at the junction of said main crown facets with the table facet, the number of said crown star facets is ten; crown small facets are provided at the junction of main crown facet edge with the crown star facets, the number of said crown small facets are ten; small sectors are provided at the junction of the main crown facets with the crown small facets, the number of said small sectors are twenty; the main pavilion facet auxiliary surfaces are provided at the junction of said main pavilion facets, the number of the auxiliary surfaces of said main pavilion facets is 20. The beneficial effect of the invention is that: by cutting the diamond into eighty-one facets and having the ten hearts and ten arrows inner structure, not only endowing the diamond with higher quality and value by an advanced cutting technology, but also improving the brilliance of the diamond under sunlight, and its brilliance can be improved by 20-30%. The diamond of the present invention has more brilliance.

1 . A diamond with eighty-one facets having a ten hearts and ten arrows inner structure, characterized in that: it comprises ten main crown facets ( 3 ) and ten main pavilion facets ( 1 ); the diamond further has one table facet ( 4 ); crown star facets ( 7 ) are disposed at the junction of the main crown facets ( 3 ) with the table facet ( 4 ), the number of the crown star facets is ten; crown small facets ( 10 ) are disposed at the junction of main crown facet edges ( 6 ) with the crown star facets ( 7 ), the number of the crown small facets is ten; small sectors ( 13 ) are disposed at the junction of the main crown facets ( 3 ) with the crown small facets ( 10 ), the number of said small sectors is twenty; main pavilion facet auxiliary surfaces ( 2 ) are disposed at the junction of the main pavilion facets ( 1 ), the number of the main pavilion facet auxiliary surfaces is twenty;
 wherein the crown star facets ( 7 ) are isosceles trapezoids, upper bases of the crown star facets ( 7 ) are lower bases of the crown small facets ( 10 ), lateral sides of the crown star facets ( 7 ) are inner bases of the main crown facets ( 3 ), the crown small facets ( 10 ) are bilaterally symmetrical pentagons, the main crown facets ( 3 ) are bilaterally symmetrical hexagons, the crown small facets ( 10 ) and the main crown facets ( 3 ) share common lateral sides, two sides of the small sectors ( 13 ) respectively are external bases of the main crown facets ( 3 ) and the crown small facets ( 10 ).   
     
     
         2 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the length of said crown star facet girdle ( 5 ) is 50% of the length of the main crown facet edge ( 6 ), and the angle between the crown star facets ( 7 ) with the table facet ( 4 ) is 15.5-18.5°. 
     
     
         3 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the angle between the short edge of said crown small facets ( 8 ) with the edge ( 12 ) is 110°, and the height of the crown small facets is 75% of the height of the main crown facet edge ( 6 ). 
     
     
         4 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the length of said small sector side ( 11 ) is 50% of the edge ( 12 ), an angle between the small sectors and the girdle facets is 35.5-36.5°. 
     
     
         5 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: said bottom boundary line of the main pavilion facet auxiliary surface ( 14 ) is 50% of the bottom boundary line of the main pavilion facets ( 15 ), the main pavilion facet auxiliary surface edge ( 16 ) is 75% of the main pavilion facet edge ( 17 ). 
     
     
         6 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the angle between said main pavilion facets ( 1 ) and the girdle facets ( 9 ) is 40.5-40.8°. 
     
     
         7 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the angle between said main pavilion facet auxiliary surfaces ( 2 ) and the girdle facets ( 9 ) is 42-42.3°. 
     
     
         8 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the angle between said main crown facet ( 3 ) and the girdle facets ( 9 ) is 34-35°. 
     
     
         9 . The diamond with eighty-one facets having the ten hearts and ten arrows inner structure according to  claim 1 , characterized in that: the roundness of said diamond is 99-100%, the diamond height (h) is 60.5% of the diamond diameter (d), the table facet diameter (d 1 ) is 56-57% of the diamond diameter (d), the crown height (h 2 ) is 14.5-15.5% of the diamond diameter (d), the girdle thickness (h 3 ) is 2.5% of the diamond diameter (d), the pavilion height (h 1 ) is 43.5-45% of the diamond diameter (d), the main pavilion facet angle (α) is 40.5-40.8°, and the main crown facet angle (β) is 34-35°.