RINOVA Diamond Guide
Diamond Color
Diamond colour measures how colourless a stone is. Graded D to Z, the less colour a diamond shows, the icier and more premium it appears.
The Color Scale
From icy colourless (D) to faint warmth (Z). Tap any grade to see what it means.
D–FG–JK–MN–Z
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D–F (Colourless) — no tint visible, even against a white background or in a white metal setting. This is the only range we set.
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G–J (Near Colourless) — a faint warmth that appears only when compared side by side with a colourless stone.
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K–M (Faint) — a subtle warmth that some people like in yellow or rose gold.
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N–Z — visible tint. Rarely used in fine jewelry.
Why We Do Not Offer Lower Grades
Most jewellers will steer you toward G–H, and in a mined stone that advice makes sense — the saving is substantial. In a lab grown diamond the gap between E–F and G–H is far smaller, so we set E–F on everything and pass the difference on in the price instead. One less decision, and no compromise to explain later.
Where Colour Shows Most
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Bigger stones show colour more — above about 1.5 ct, any tint becomes easier to see. Another reason we hold the grade at E–F across every size.
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Step cuts show colour more — emerald and Asscher cuts have large, flat facets that reveal tint. Brilliant cuts hide it.
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Metal changes the reading — a warm setting makes a stone look warmer; platinum and white gold show colour most honestly.
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Compare only side by side — a single diamond looks white on its own. Colour grading is a comparison, not an absolute.