大家坛

关于GIA中ex切工的相关数据

11
讨论

理想 優質 非常好 好
鑽面 53-58% 53-60% 53-62% 52.5-66%
鑽冠角度 34.5 34-35.5 32-35.5 30-37
鑽腰 Thin - Slightly Thick Very Thin - Slightly Thick Very Thin - Thick Very Thin - Very Thick
深度 59-62.7% 58-63% 57-64.5% 56-65%

更多回帖