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Diamond Colour — From D to Z

The 4Cs

Diamond Colour — From D to Z

The GIA D–Z scale, near-colourless sweet spots, and how mounting metal affects face-up hue.

Colour grading measures body colour on the D→Z continuum; D–F read icy, G–J can still photograph white if cut is commanding.

Tone strip (conceptual)

Yellow gold mountings camouflage faint warmth; platinum demands higher colour tiers for the same “white” subjective read.
Hue vs saturation: fluorescence can cool I–K face-up daylight while leaving the grade unchanged.
Always compare melee side stones when ordering halos—they should not out-whiten the hero diamond.

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