Quick answer: CVD and HPHT are two different processes used to grow diamonds in a laboratory. Both produce real, certified diamonds. For the finished stone in your ring, the growth method makes almost no visible difference — the 4Cs and certification matter far more.

What is HPHT?

HPHT (High Pressure, High Temperature) recreates the intense pressure and heat found deep within the earth, where natural diamonds form. A small diamond seed is exposed to these conditions and a larger diamond grows around it.

What is CVD?

CVD (Chemical Vapour Deposition) grows a diamond from a carbon-rich gas inside a sealed chamber. Carbon atoms settle onto a seed layer by layer, building the crystal over time.

CVD vs HPHT at a glance

	CVD	HPHT
Method	Carbon gas deposition	Extreme pressure & heat
Result	Real diamond	Real diamond
Certification	IGI / GIA where stated	IGI / GIA where stated
Everyday appearance	Identical to the eye	Identical to the eye

Does it matter which you choose?

Not really. Once a diamond is cut, polished and graded, its beauty comes down to the 4Cs and its certificate — not the growth method. Browse our lab-grown diamond rings to see them for yourself.