| 摘要 |
<p>The diamond cut pattern for a diamond, or gemstone, with seventy-four facets, comprising eight main crown facets 1 and eight main pavilion facets 2. There is one round table facet 3 at the top end of a crown portion and eight crown arrow star facets 5 with eight upper girdle right star facets 6 and eight upper girdle left star facets 7 provided at two sides under the crown arrow star facet and above the girdle. There are eight pavilion arrow star facets 8 with eight lower girdle right star facets 9 and eight lower girdle left star facets 10. The height of the pavilion arrow star facets is half that of the main pavilion facet. A bottom tip star facet 11 is provided at the bottom end of the pavilion portion.</p> |
