Lab-grown vs natural.
They are the same material. Not similar, not almost — the same crystalline carbon, with the same hardness, graded on the same scales by the same laboratories. What differs is how each one came to exist, and everything else follows from that.
Material, hardness, brilliance, grading.
Origin, price, rarity, resale.
Cut in the same workshop, stated on every listing.
Side by
side.
Ten rows, both sides of each. The rows that favour lab-grown and the rows that do not are on the same table on purpose.
- Natural
- Crystalline carbon.
- Lab-grown
- Crystalline carbon — the same, not a simulant.
- In practice
- Both are diamond. Moissanite and cubic zirconia are not; they are different materials that look similar.
- Natural
- 10 on the Mohs scale.
- Lab-grown
- 10 on the Mohs scale.
- In practice
- Identical. Neither scratches more easily than the other.
- Natural
- Deep in the earth, over geological time.
- Lab-grown
- In a reactor, over weeks, by HPHT or CVD.
- In practice
- The only real difference, and the one everything else follows from.
- Natural
- Requires laboratory equipment.
- Lab-grown
- Requires laboratory equipment.
- In practice
- No jeweller can tell by eye or with a loupe. This is why certification is not optional on either.
- Natural
- Same four Cs, same scales.
- Lab-grown
- Same four Cs, same scales; origin stated on the report.
- In practice
- GIA, IGI and HRD all grade both. The report always says which it is.
- Natural
- The benchmark.
- Lab-grown
- Substantially less at the same grades.
- In practice
- The gap is large and has widened as growing capacity has increased.
- Natural
- Holds a meaningful share of its value.
- Lab-grown
- Holds very little.
- In practice
- The honest position: buy lab-grown for what it is, not as an asset.
- Natural
- Traceable in principle; rarely to a specific mine.
- Lab-grown
- No mining chain to trace.
- In practice
- If provenance is your concern, lab-grown answers it outright.
- Natural
- Extraction, land use, energy.
- Lab-grown
- Considerable energy; how clean depends on the supply.
- In practice
- “Lab-grown” is not a carbon claim on its own, and we will not present it as one.
- Natural
- Finite supply.
- Lab-grown
- Producible to demand.
- In practice
- Whether that matters is a question about you, not about the stone.
How a diamond
is grown.
Two methods, both starting from a diamond seed. Neither produces a better stone than the other — a well-cut CVD and a well-cut HPHT are indistinguishable to the eye.
Recreates the conditions under which natural diamonds form: a small diamond seed, carbon, and a press applying enormous pressure and heat. The oldest of the two methods and still widely used.
A carbon-rich gas is broken down in a vacuum chamber and carbon atoms settle onto a diamond seed, layer by layer. Slower, more controllable, and now the dominant method for gem-quality stones.
Which is
right for you.
There is no better answer here, only a question about what you are buying the stone for. Read both lists; one of them will sound more like you.
Asked about
lab-grown.
Yes. It is the same crystalline carbon with the same hardness, refractive index and optical behaviour, and the major laboratories grade it on the same scales. A simulant like moissanite or cubic zirconia is a different material; a lab-grown diamond is not.