| Carat | weight of stone |
100 points to carat 5 carats = 1gm |
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| Cut | shape of stone type of cut proportion polish |
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| Colour | "whiteness" or lack of colour graded alphabetically from D |
D - |
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| Clarity | presence of "flaws" in or on the Diamond |
IF - no inclusions VS - only visible under lens SI - slightly included I |