CVD
Chemical vapour deposition. Carbon from a gas is deposited, layer by layer, onto a thin diamond seed until a crystal forms.
Laboratory-grown diamonds
Laboratory-grown diamonds are real diamonds, grown above ground instead of mined. We sell them to the trade under their own name, and they're never mixed with natural stock.
Two ways they're grown
HPHT
High pressure, high temperature. A diamond seed sits in carbon under the heat and pressure found deep in the earth, and a crystal grows from it.
As-grown or treated
Some lab-grown diamonds are treated after growth to improve their colour. Grading reports record this, and we pass on exactly what the report says.
Reports and uncertified stones
- LabsIGI, GIAIGI and GIA issue laboratory-grown reports, and certified stones are listed with their report number.
- GIA from 1 October 2025Premium or StandardGIA reports issued from 1 October 2025 give a Premium or Standard assessment; earlier GIA reports give colour and clarity grades.
- CheckOn the lab's siteVerify any report with the lab.
- UncertifiedGraded in-houseLab-grown melee and some smaller stones are sold without a lab report and are graded in-house. They're labelled that way in our listings.
How we describe them
We write "laboratory-grown diamond" in full, with the word diamond right beside it and equal weight, in the trade portal, on invoices and in every listing. We don't make environmental claims we can't back up.
Questions
Are lab-grown diamonds real diamonds?
Yes. They have the same crystal structure and hardness as natural diamonds. The difference is where they formed.
Can a lab-grown diamond be told apart from a natural one?
Not by eye. Gem labs identify them with specialist instruments, and the grading report states the origin.
Do you sell lab-grown melee?
Yes, by parcel. See melee & parcels.
Not listed? Ask us
Call our Sydney office: +61 410 058 909