引用2楼 caixinaobao 是不是说3最好,3.5和4 也可以?
GIA国际认证的钻石最佳比例标准(“严选”是指钻石的最理想黄金比例): 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 11.Polish 抛光:Very Good or Excellent,严选Excellent 12.Symmetry对称性:Very Good or Excellent,严选Excellent