项 目

完美车工

顶级车工

Total Depth Percentage

深度比例

57.5%-63%

严格60%-62.5%

Table Percentage 桌面比例

52%-62%

严格53-57%

Crown Angle 冠部角度

31.5-36.5度

严格34-35度

Crown Height Percentage 冠部高度比例

12.5%-17%

严格 14.5-15.5.%

Pavilion Angle 底部角度

40.4-41.8度

严格40.5-41.2 度

Pavillion Depth Percentage 底部深度比例 

42.5-44.5%

严格42.5-43.5.%

Star Facet Length Percentage 星形刻面長度比例

45%-65%

严格50-55%

Lower Girdle Facet Percentage 腰下刻面比例

70%-85%

严格75-80%

Girdle Thickness 腰围厚度

Thin,Thin to Medium.,Thin to Slightly Thick, Medium,Medium to Slightly Thick,Slightly Thick.等六種

严格Thin to Medium ,Medium, Medium to Slightly Thick等三种

Girdle Thickness Percentage 腰围厚度比例

2.5%-4.5%

严格2.0-3.5%

Culet Size 底尖大小

None-very small,small

严格None

Polish 拋光

Very Good or Excellent

严格Excellent

Symmetry 对称

Very Good or Excellent

严格Excellent

Fluorescence萤光反应

严格None

Add Ins额外刻印

严格H&A