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Community›r/diamonds›Round Diamond Length to Width Ratio: The Perfect Circle Rule

r/diamonds·Posted by u/farzanahasan·7d ago

Round Diamond Length to Width Ratio: The Perfect Circle Rule

u/farzanahasan · 2026-06-18T10:06:31.751098+00:00

Round diamonds should have a 1.00–1.01 L:W ratio for a true circle face-up. A 1.04+ looks oval. Here's how to check it and why GIA Excellent doesn't guarantee it.

diamondcritics.com— Round Diamond Length to Width Ratio: The Perfect Circle Rule

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