Lab grown or mined: the honest comparison

Every jeweller selling lab-grown diamonds will tell you they are "identical to mined". Every jeweller selling mined diamonds will tell you lab-grown are "not real". Both are pitching. Here is the version without a side.

What is genuinely identical

A lab-grown diamond is carbon arranged in the same cubic crystal lattice as a mined one. Same 10 on the Mohs hardness scale. Same refractive index, which is what produces the fire you actually see. It is not a simulant — cubic zirconia and moissanite are different materials entirely, and both look different to a trained eye.

A standard diamond tester reads a lab-grown stone as diamond, because it is one. Distinguishing it requires equipment that detects growth patterns, which is exactly how the certifying laboratory identifies it.

Nobody will look at your hand and know. Not your friends, not a jeweller across a counter.

What is genuinely different

Scarcity, and therefore price.

A mined stone formed over a billion years and the supply is finite. A lab-grown one was made in a few weeks in a facility that can make another. That is why the same budget buys roughly four to five times the stone.

Put concretely: the money that buys a modest 0.50ct mined solitaire buys well over a carat lab-grown. The difference is not subtle — it is visible from across a room.

The part that costs us the sale

Lab-grown diamonds do not hold their value.

Production capacity keeps rising and prices have fallen year after year. Resale today is close to nil, and there is no reason to expect that to reverse.

We sell lab-grown, so this is the paragraph we have the most incentive to leave out. But if you are buying partly because you think of jewellery as a store of value — which is a completely normal way to think in India — then a mined stone or plain gold is the better answer, and you should know that before you pay rather than in ten years.

So which should you buy?

Ask what the piece is for.

Buy lab-grown if you want the largest, cleanest stone your budget allows, you are buying it to wear, and the idea of a bigger diamond for the same money appeals more than the idea of a rarer one.

Buy mined if the stone is meant to be passed on, or if resale value is part of why you are spending.

Buy neither if you are being pushed. A jeweller who cannot tell you the downside of the thing they are selling is not giving you information, they are closing you.

What to check either way

• An IGI or GIA report for anything above 0.20ct, with the number inscribed on the girdle. Verify it on the laboratory's own website.
• The report should say whether the stone is laboratory-grown. If a seller is vague about this, that is the answer.
• BIS hallmark on the gold, with a six-digit HUID you can look up.
• A GST invoice in your name. You need it for insurance, and for any future sale.