Build yours
Design it your way
Pick the setting, stone and gold. Watch it come together, then share it or add it to your bag.
VS clarity · F–G color · graded in-house. 18K and custom on request.
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.
Shape guide
Find your shape
Tap a shape to see its real size at your carat, how big it looks next to a round, and who it suits. Every shape is available custom.
Price checker
What should a lab diamond cost?
Set the shape, size, color and clarity to see a fair price range, what the same diamond costs mined, and our pieces at that size.
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.
Ring size finder
Find your ring size
Match a ring you own on screen, measure your finger, or print a sizer. Takes under a minute.
Use a method on the left.
Full size chart
| US | UK | EU | Diameter mm | Circ. mm |
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Between sizes? Go up half a size. Wide bands fit snugger, so size up for bands over 6 mm.
Gift finder
Four taps to the right piece
Answer a few quick questions and we will match you with the piece that fits.
Real or Lab?
Can you tell the difference?
Six quick questions. Most people get fooled on the first one.
Sign up for early access to new pieces and get 10% off your first order.
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DKLA10Use it at checkout. One use per customer.
Fit guide
Where will it sit?
Tap a length to see where a pendant lands.
Want a different length? Add a note at checkout or reach out and we will make it.