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| 顏色 | GIA (Gemological Institute of America) |
AGS (American Gem Society) |
HRD (Hoge Raad voor Diamnt) |
| 無色 Colorless |
D | 0 | Exceptional White+ |
| E | 0.5 | Exceptional White |
|
| F | 1.0 | Rare White+ | |
| 近乎無色 Near Colorless |
G | 1.5 | Rare White |
| H | 2.0 | White | |
| I | 2.5 | Slightly Tinted White | |
| J | 3.0 | ||
| 微黃色 Faint Yellow |
K | 3.5 | Tinted White |
| L | 4.0 | ||
| M | 4.5 | Tinted Colour | |
| 很淡黃色 Very Light Yellow |
N | 5.0 | |
| O | 5.5 | ||
| P | 6.0 | ||
| Q | 6.5 | ||
| R | 7.0 | ||
| 淡黃色 Light Yellow |
S | 7.5 | |
| T | 8.0 | ||
| U | 8.5 | ||
| V | 9.0 | ||
| W | 10 | ||
| X | |||
| Y | |||
| Z |
| 淨度 | GIA (Gemological Institute of America) |
AGS (American Gem Society) |
HRD (Hoge Raad voor Diamnt) |
無瑕級 |
FL | 0 | Loupe Clean |
內無瑕級 |
IF | ||
極輕微內含級 |
VVS1 | 1 | VVS1 |
| VVS2 | 2 | VVS2 | |
輕微內含級 |
VS1 | 3 | VS1 |
| VS2 | 4 | VS2 | |
微內含級 |
SI1 | 5 | SI1 |
| SI2 | 6 | SI2 | |
內含級 |
I1 | 7 | P1 |
| I2 | 8 | P2 | |
| 9 | |||
| I3 | 10 | P3 |
★★GIA鑽石價錢與鑽戒的價錢 ： http://tw.knowledge.yahoo.com/question/question?qid=1611081709431
★★GIA 鑽石價錢查詢：http://tw.user.bid.yahoo.com/tw/booth/Y1672259732
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