Diamond Buzz on Instagram: "THE COST OF PRODUCTION: HPHT VS CVD METHOD The cost of producing lab-grown diamonds varies depending on the method used. The two primary methods, HPHT (high-pressure high-temperature) and CVD (chemical vapour deposition) have different cost structures due to the differences in equipment, technology, and time required for production. The cost of producing HPHT diamonds is generally lower than that of producing CVD diamonds. This is because the HPHT method requires…