CVD vs HPHT Diamonds - The Complete Difference

Limelight Diamonds | 2023

Diamonds produced through the CVD process are 100% carbon & are purest, whereas HPHT diamonds contain chemical impurities.

1. Diamond Purity

In CVD, a natural diamond seed is infused with gases resulting in pure diamonds. Whereas the HPHT method uses molten metal which results in chemical impurities.

2. Diamond Growing Process

Lab grown CVD diamonds and natural diamonds are rated 10 on Mohs scale of hardness whereas HPHT diamonds are 9.75.

3. Hardness Scale

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