Page 55 - Thailand Gems & Jewelry Guide Book

Thailand’s Gems & Jewelry Guide Book
55

GIA Color Scale
Trade Terms

Colorless

to
D
Jager
Finest White
Colorless
E Colorless
River

F

Fine White
Stones in these grades look G
Top Weselton

colorless face-up; slight traces White
Weselton
of color will not be apparent in H
mounted stones to other than Near
Colorless the trained eye.
I
Wesselton
Commercial Top Crystal

White

Small stones in these range J
Top Silver Cape
Crystal
will look colorless face-up

when mounted, but large one K
will be tinted.
Faint Sliver Cape
Top Crystal
L
Yellow
Cape
M
Light Cape
Low Cape
N

Very O

Light P
Yellow
Cape

Q

R

Low S
Light Mounted stones in these
T
Yellow
grades will display a Yellowish
tint even to the untrained eye.
U
Light
V
Dark Cape
Yellow

W

X

Y

Z
Fancy

Fancy
Yellow
Source : Gemological Institute of America (GIA)

Note: Fancy color diamonds, which can be any color from blue

to green to bright yellow; do not follow this rule as they are very rare

and expensive. They are actually more valuable for their color and

clarity.

备注:有时候泰国人也用“水种”来比喻宝石的颜色,水种越好的宝石越纯净且没有黄颜色

掺和,D为100% 水种,E是99% ,F是98% 的水种,以此类推。