Color:
D,E,F Colorless
G,H,I,J Near Colorless
K,L,M Faint Yellow
N-,R Very Light Yellow
S-Z Light Yellow
Z+ Fancy Colors

Clarity Grades:
F Flawless
IF Internally Flawless
VVS1
VVS2 Very, Very Slightly Included
VS1
VS2 Very Slightly Included
SI1
SI2 Slightly Included
I1
I2
I3 Included(eye visible)

Shape:
Round
Fancy shapes (all shapes other than round), which include:
Marquise (pointed oval)
Princess (square)
Pear (teadrop)
Emerald (rectangle with trimmed corners)
Trillion (triangle)
Heart
Oval
Radiant (square with trimmed corners)

绝对是cut最重要，对整个钻石的感觉影响最大

cut不好，颜色不正，纯净度不高，克拉数再大，戴上撑死了也就是个暴发户