What are the downsides of lab-grown diamonds?
Quick answer
Resale value is the main one. Lab diamond prices have dropped as production capacity has grown, so a stone bought today is likely to be cheaper to replace in a few years and will not hold its retail value at resale. Some buyers also prefer the romance of a mined stone formed over millions of years. If you are buying to wear rather than as an investment, the practical downsides are minor.
Resale by the numbers
Lab-grown diamond retail prices fell roughly 74% between 2020 and 2024. A 1ct stone that retailed for around $3,400 in 2020 sits closer to $900 today. On the secondary market the picture is even tighter: most lab diamonds resell for 10 to 20% of what was originally paid, partly because new inventory is so much cheaper and partly because resale buyers are choosing between your stone and a brand-new equivalent at lower retail.
Why prices keep falling
Production capacity continues to grow, primarily in India and China where CVD and HPHT reactors have scaled rapidly. Wholesale prices have fallen further than retail, with 1ct wholesale prices dropping as much as 96% since 2018. Industry data from 2026 suggests the rate of decline is slowing for premium IGI-certified goods, but the gap to mined is still widening. By 2026, lab-grown sits about 80 to 85% below the equivalent mined stone.
Next step
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