(The 4Cs)
The 4Cs
Cut, colour, clarity, carat — the language of diamonds. Learn it here, then play with a live stone.
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(The lab)
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Carat1.00
0.5 ct2.557.510 ct
ColourD
DFHJM
ClarityIF
IFVVSVSSII
CutExcellent
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Indicative price€0
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Cu
Cut
The only C made by hand. Proportions and polish decide how much light returns to your eye as brightness, fire and sparkle.
Co
Colour
Graded from D, colourless like water, to Z. Below J a warm tint appears; above F, only a gemmologist can tell.
Cl
Clarity
Tiny crystals and feathers inside the stone. IF means none under 10× magnification; I means visible to the eye.
Ca
Carat
Weight, not size: one carat is 0.2 grams. Price climbs much faster than weight — a 2-carat stone costs about four times a 1-carat.