Lab-grown or natural diamond: an honest comparison from a maker who sells both
13.08.2026 · Rauno Oidram
A lab-grown diamond is physically and chemically identical to a natural one: the same carbon, the same 10/10 hardness, the same fire. No eye and no loupe can tell them apart — only laboratory equipment. The difference lives in two places: price (a lab stone costs a fraction at the same size) and value retention (natural holds value; lab resale prices are low and falling). We sell both, so we have no reason to flatter either.
Where they are the same
- Same crystal structure, hardness and optics — the sparkle is identical.
- Both are graded by GIA or IGI on the same 4C scales.
- Both last generations and take daily wear equally.
Where they differ
- Price: in Estonia a handmade ring with a lab-grown stone typically costs €1,500–4,000; the same size class with a natural stone €10,000–20,000.
- Value retention: here is the sentence many shops will not print: a lab-grown diamond does not hold value the way a natural one does. Production keeps getting cheaper and the resale market is thin. Buy a lab stone for its beauty, not as an investment.
- Rarity and story: a natural diamond is billions of years old and finite. For some people that meaning alone is worth the entire price gap; for others it is not — both are correct answers.
The comparison in one table
| Property | Lab-grown | Natural |
|---|---|---|
| Composition and hardness | Identical: pure carbon, hardness 10/10 | |
| Fire and appearance | Identical — no difference by eye or loupe | |
| Origin | A lab, in weeks | The earth, over billions of years |
| Price at Keefirivunts (ring) | mostly 1,500–4,000 € | mostly 10,000–20,000 € |
| The same budget buys | a 2–3× larger stone | rarity and a story |
| Value retention | resale prices are low and falling | holds value better |
| Certificate | GIA or IGI on the same 4C scales; origin always stated | |
Which to choose?
Choose lab-grown if you want a larger, brighter stone for the same money and value retention is not your argument. Choose natural if rarity, story and stored value are part of what you are buying. Roughly how it falls among our clients: most choose lab for the size; those who choose natural do it knowingly, and for a reason.
Read next: Lab-grown vs natural · The diamond 4Cs, plainly: what matters and where to save · Where diamonds and gold actually come from — the certificates that mean something
Frequently asked
Is a lab-grown diamond a real diamond?
Yes. It is chemically and physically identical to a natural diamond — same carbon, same hardness, same fire. Only the birthplace differs: a lab, not the earth.
Does a lab-grown diamond hold its value?
Honestly: not the way a natural one does. Production costs keep falling and the resale market is thin. Buy lab for beauty and size, not as an investment.
Can anyone tell the stone is lab-grown?
No. Not by eye, not by loupe — telling them apart takes laboratory equipment. The certificate always states the origin plainly.
Rauno Oidram — goldsmith, Keefirivunts
Designs the Keefirivunts rings and chooses the stone that goes into each one.
