There are currently two main methods for producing lab grown diamonds:
High pressure, high temperature (HPHT)
This was the first commercially viable method for the creation of diamonds and is still the main production method in use worldwide. This process mimics the conditions under which natural diamonds develop when they form beneath the Earth’s crust. This method uses a central reaction cell surrounded by a large mechanical press, which is subjected to high pressures and temperatures. Inside the reaction cell, a diamond seed acts as a nucleus upon which the lab grown diamond crystal grows. Production of gem-quality lab grown diamond of a few carats can take only a few weeks.
Chemical vapour deposition (CVD)
This method is quite different to natural diamond formation and is now becoming much more widespread. The process produces lab grown diamond from a heated, carefully controlled mixture of gases in a vacuum chamber at very low pressures. As the required, extreme temperature is reached, the gas molecules break apart and carbon atoms bond to the diamond seed crystals. The carbon atoms repeatedly attach themselves to the diamond seed, growing the lab grown diamond layer by layer. Production of gem-quality CVD Lab grown diamonds takes only a few weeks.
Why choose
lab grown diamonds?
Quality
Lab grown diamonds have identical chemical, physical and optical properties as real diamonds – only an expert and a high-tech machine can tell the difference.
Affordability
Because lab grown diamonds have identical properties as natural diamonds, you can afford to buy a bigger and better quality diamond.
Ethical
Unlike natural diamonds, no mining is required, so no land, wildlife or local communities are displaced or conflicts funded.
Comparison of key properties
| Lab Grown Diamonds | Natural (Mined) Diamonds | |
|---|---|---|
| Chemical Composition | Carbon (C) | Carbon (C) |
| Hardness | 10 | 10 |
| Refractive Index | 2.42 | 2.42 |
| Dispersion | 0.044 | 0.044 |
| Density | 3.52 | 3.52 |
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They are real diamonds. They have the same optical, chemical, thermal, and physical features.
Gemological Institute Of America (GIA)
How are lab grown
diamonds made?
Created Brilliance
lab grown diamonds
All Created Brilliance Lab grown diamonds are hand-selected and graded by the 4C’s (colour, clarity, cut and carat weight), in the same manner as natural diamonds.
To be a Created Brilliance lab grown diamond, diamonds must have a minimum colour and clarity of GH SI2-I1.
Each piece of Created Brilliance jewellery has been designed to enhance the diamond's beauty and optimise its brilliance. Many of the Created Brilliance pieces feature its signature heart motif and every design is laser inscribed with the brand logo.
Each piece of Created Brilliance jewellery is accompanied by an authenticity certificate which guarantees your piece is lab grown diamond.