Short answer: very little. A lab-grown diamond is a real diamond, but there is almost no second-hand market for loose lab-grown stones, and their prices have fallen as production has grown. Buy one because you want to wear it, not to sell it later. The part of a piece that keeps a measurable value is the precious metal.
It is one of the first questions people ask, and one many sellers avoid. Here is the straight answer, why it is true, and what it means for how you choose.
Why resale value is low
- Supply can grow. A lab-grown diamond is the same carbon crystal as a mined one — see are lab-grown diamonds real — but it is grown, so production can expand to meet demand. As it has expanded, prices for lab-grown stones have come down year after year.
- Few buyers for used stones. Many jewellers, pawnbrokers and diamond buyers do not buy lab-grown diamonds back at all, or offer very little, because a new stone of the same size is easy to obtain.
- Retail price includes more than the stone. What you pay covers design, metal, setting, labour, finishing and the seller's costs. None of that is recovered when a stone is sold on its own.
What about mined diamonds?
Mined diamonds are often described as holding value, but in practice most people who sell a mined diamond receive well below what they paid, for the same reason: the retail price carries costs a second-hand buyer will not pay for. The difference is one of degree. Mined diamonds do have an established resale market; lab-grown diamonds, so far, largely do not. If resale matters to you, that is a genuine point in favour of a mined stone. Our comparison, lab-grown vs mined diamonds, sets out the rest.
What does keep value
The metal. 18K gold (AU750) and PT950 platinum are valued by weight and purity, and that value follows the market price of the metal, not the price of the piece. Sterling silver has metal value too, though much less. The stone, the design and the craftsmanship are what you are paying to wear. If metal stamps are unfamiliar, see jewelry stamps explained.
How to buy with that in mind
- Choose for wear, not for exit. Pick the size, shape and setting you will enjoy every day; that is where the value is.
- Put the budget where it lasts. A well-made setting in a durable metal will outlast a slightly larger stone in a weaker one. PT950 vs S925 explains the trade-off.
- Be wary of investment language. Any seller who presents a lab-grown diamond as an investment is overselling it.
- Think in years of wear. A piece worn every day for twenty years has done its job, whatever it would fetch second-hand. See buy once, wear for years.
Where this leaves lab-grown diamonds
The case for a lab-grown diamond is not resale. It is that you get a real diamond — the same hardness, brilliance and fire — in a larger size or a better setting for the same budget. If that is what you want from it, low resale value costs you nothing you were counting on.
Aetheris makes every piece to order in 18K gold, PT950 platinum or S925 silver — browse lab-grown diamond jewelry, or read more in our diamond education guides.
Frequently asked questions
Can I sell a lab-grown diamond?
You can try, but expect few buyers and low offers. Many shops do not buy lab-grown stones at all. Treat any resale as a bonus, not a plan.
Will lab-grown diamonds keep getting cheaper?
No one can promise either way. The trend so far has been downward as production has grown, which is part of why resale value is low.
Does a bigger lab-grown diamond hold value better?
Not meaningfully. The same forces apply at every size.
Is a lab-grown diamond still a good buy?
If you are buying jewelry to wear, yes: it is a real diamond for considerably less. If you are buying something to resell, no.