D (Colourless)
The highest colour grade. No hint of yellow or brown; appears icy and perfectly colourless in any setting.
D (Colourless): The highest colour grade. No hint of yellow or brown; appears icy and perfectly colourless in any setting.
D is the top of the GIA colour scale and reflects the rarest colour outcome for both natural and lab-grown stones. D diamonds are visually indistinguishable from E and F in a mounted setting; the premium paid for D reflects rarity and certification, not appearance.
Standards bodies: GIA, AGS
Frequently asked questions
Can a buyer tell D from E or F in a ring?
Not reliably. Side-by-side comparison under lab lighting is usually required. In any standard engagement setting, D, E, and F appear identical.
Is D colour worth the premium?
For maximum rarity and resale, yes. For visible performance, usually no. G is typically the value choice that still faces up fully colourless.
Does clarity need to match the colour grade?
No. Pair D colour with whatever clarity you prefer; VS1 or VS2 are a common sweet spot.
Related terms
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