Size guide
See the difference
Slide to compare any two of our stones. Sizes in millimeters, prices pulled live from the collection.
Hold any credit card against your screen. Drag until the box matches its width.
Round brilliant, ideal proportions. Millimeters are typical per-stone diameters; every stone is measured in-house.
Price checker
What should a lab diamond cost?
Set the shape, size, color and clarity to see a fair price range and what the same diamond costs mined.
Fair lab-grown price · loose stone
Comparable mined diamond · est.
Don Key pieces at this sizeEstimates for the loose stone only, before setting and gold, based on typical US retail. Prices vary by cut quality and seller. Don Key standard is F–G color, VS clarity.
Same diamond. Different math.
Lab-grown vs mined
Chemically and optically the same diamond. See what you keep by choosing lab-grown.
Mined figures are typical US retail estimates for a comparable natural diamond (F–G, VS, round) and vary by retailer.
Test yourself
Real or lab?
Six quick questions. Most people get fooled on the first one.
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