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菜鸟求问啥是严选?

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“严选”是指钻石的理想黄金比例. 严选的版本不止一个, 下面供参考.
1.Total Depth Percentage深度比例:57.5%-63%,严选60%-62.3%
2.Table Size 桌面比例:52%-62%, 严选54-58%
3.Crown Angle 冠部角度:31.5-36.5度,严选34-35度
4.Crown Height 冠部高度比例: 12.5%-17%,严选 15-15.5%
5. Pavilion Angle 底部角度: 40.4-41.8度,严选40.5-41 度
6.Pavillion Depth 底部深度比例: 42.5-44.5%,严选42.5-43.5%
7.Star Facet Length Percentage 星形刻面长度比例:45%-65%,严选50-55%
8. Lower Girdle Facet Percentage 腰下刻面比例:70%-85%,严选75%
9.Girdle Thickness 腰围厚度:Thin,Thin to Medium.,Thin to Slightly Thick,Medium,Medium to Slightly Thick,Slightly Thick共六种, 严选 Thin to Medium, Medium, Medium to Slightly Thick这三种
10.Culet Size 底尖大小:None-very small,small,严选None

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