Guides
CVD and HPHT are two ways to grow a real diamond in a lab. Neither method replaces the 4Cs — or a good look at the stone.
HPHT (high pressure, high temperature) grows diamond under extreme pressure and heat. CVD (chemical vapor deposition) grows diamond from carbon-rich gas in layers.
Both produce diamond: the same crystal structure buyers mean when they say the stone is “real.” Origin is laboratory-grown; beauty still comes from cut, color, clarity, and carat.
IGI lab-grown reports commonly state CVD or HPHT and may note post-growth treatment. Read the comments — “as grown” language and treatment notes matter more than which acronym sounds nicer.
A treated CVD stone is not automatically a bad buy; undisclosed treatment would be. Transparency is the standard.
Filter lab-grown type on Carat Mate when you care about method, then sort by cut, color, clarity, and price as usual. Prefer Excellent cut rounds and clean face-up media.
Do not pay a premium for a growth method alone. Pay for the stone you can see and verify.
Carat Mate lists certified loose diamonds for shoppers in the United States, Canada, the UAE, London, and Australia. Prices are in USD everywhere. We ship to the United States, Canada, the UAE, London, and Australia.
