Jewel

Abstract

[Problem] The purpose of the present invention is to provide a jewel on which cuts with excellent symmetry are made, such cuts having originality, exceling aesthetically, and being novel. [Solution] A diamond ( 1 ), serving as a jewel, is cut so as to have a crown ( 3 ) provided with a table ( 2 ), and a pavilion ( 5 ) provided with a culet ( 4 ). By creatively modifying the shape and disposition of a main facet ( 8 ) formed in the pavilion ( 5 ), the diamond ( 1 ) is configured so that a heart pattern can be made to appear when the diamond ( 1 ) is viewed from the table ( 2 ) side.

1 . A jewel comprising:
 a crown having a table;   a pavilion having a curette; and   a girdle formed into a round cut between the crown and the pavilion, wherein the pavilion has eight or more main facets all or some of which are of quadrangles each having interior angles all different from each other or of polygons each having five or more interior angles all different from each other, wherein all the main facets are formed such that in each main facet, a distance between the curette and an apex of an angle of the main facet, the angle being closest to the girdle, is less than 90% of the distance between the curette and the girdle, and wherein the main facets are arranged such that they are line symmetry with respect to an axis of symmetry which is at least one of lines passing through the curette to bisect the pavilion.   
     
     
         2 . A jewel comprising:
 a crown having a table;   a pavilion having a curette; and   a girdle formed between the crown and the pavilion, wherein the pavilion has eight main facets made up of four first main facets that are of pentagons each having interior angels all different from each other and four second main facets that are of pentagons line symmetrical to the pentagons serving as the first main facets, wherein the first main facets and the second main facets are arranged alternately on the pavilion, and wherein each of the pentagons serving as the first main facets and the second main surfaces is formed such that a distance between the curette and an apex of an angle of the pentagon, the angle being closest to the girdle, is less than 90% of the distance between the curette and the girdle.   
     
     
         3 . A jewel comprising:
 a crown having a table;   a pavilion having a curette; and   a girdle formed between the crown and the pavilion, wherein the pavilion has ten main facets made up of five first main facets that are of pentagons each having interior angels all different from each other and five second main facets that are of pentagons line symmetrical to the pentagons serving as the first main facets, wherein the first main facets and the second main facets are arranged alternately on the pavilion, and wherein each of the pentagons serving as the first main facets and the second main surfaces is formed such that a distance between the curette and an apex of an angle of the pentagon, the angle being closest to the girdle, is less than 90% of the distance between the curette and the girdle.   
     
     
         4 . The jewel according to  claim 1 , wherein the jewel is a diamond. 
     
     
         5 . The jewel according to  claim 2 , wherein the jewel is a diamond. 
     
     
         6 . The jewel according to  claim 3 , wherein the jewel is a diamond.