There are 4 Internationally recognised criteria for determining a diamonds price, referred to as the four C's.
| Colourless | D | Finest White |
| E | ||
| F | Fine White | |
| Near Colourless | G | |
| H | White | |
| I | Commercial White | |
| J | Top Silver Cape | |
| Slightly Tinted | K | Silver Cape |
| L | ||
| M | Light Cape | |
| Very Light Yellow | N | |
| O | Cape | |
| P | ||
| Q | ||
| Light Yellow | R | |
| S | ||
| T | ||
| Yellow | U | Dark Cape |
| V |