Few words cause more confusion in jewellery than "synthetic". It sounds like plastic, or like something pretending to be what it is not. In the diamond world, it means something quite different, and once you understand it, a lot of the drama around lab-grown diamonds simply disappears.
What "synthetic diamond" really means
In gemmology, a synthetic gem is one that has the same chemical composition and crystal structure as the natural gem, but was made by people. A synthetic diamond is therefore a real diamond: pure carbon, the same crystal, the same hardness and the same optical properties. The word describes where it came from, not what it is.
You will see several names used for the same thing:
- Lab-grown diamond
- Laboratory-created or lab-created diamond
- Man-made diamond
- Synthetic diamond
Most jewellers now prefer "lab-grown" because it is clearer and does not suggest the stone is fake.
Synthetic is not the same as simulant
A simulant is a different material that imitates diamond. It may look similar at a glance, but it is chemically and physically different.
- Cubic zirconia is zirconium dioxide. It is softer, scratches over time and often shows strong rainbow colours.
- Moissanite is silicon carbide. It is very hard and sparkly, with more colourful fire than diamond, but it is not diamond.
- Glass and crystal are much softer and lose their polish quickly.
A lab-grown diamond is none of these. It passes the same tests a mined diamond does, and it is graded on the same 4Cs.
The science, briefly
Natural diamonds formed over millions of years, deep in the earth, under enormous heat and pressure. Scientists have recreated those conditions in two ways. HPHT presses carbon around a diamond seed at extreme heat and pressure. CVD lets carbon atoms from a heated gas settle onto a seed, building the crystal layer by layer. The result, in both cases, is diamond.
How to know what you are buying
Labs such as IGI and GIA grade lab-grown diamonds and state clearly on the report that the stone is laboratory-grown. Many also laser-inscribe this on the girdle. A good jeweller will always tell you whether a stone is lab-grown or mined. If you are ever unsure, ask for the report.
Zero drama
A synthetic diamond is not a compromise or an imitation. It is the same beautiful material, made with modern science instead of mining, and usually at a much kinder price. Browse our rings to see what that looks like, or read everything you need to know about lab-grown diamonds.
