UNDERSTAND THE DETAILS
01 / Begin with a seed.
A small diamond seed provides a starting crystal structure for growth. The conditions and equipment differ between HPHT and CVD.
The growth method describes production, not a universal quality grade.
THE ESSENTIAL IDEA
Both processes grow diamond. The finished stone still needs cutting, polishing and assessment.
UNDERSTAND THE DETAILS
02 / HPHT growth.
High pressure, high temperature growth uses a press to create intense pressure and heat. Carbon dissolves in a metal solvent and crystallizes as diamond on the seed.
HPHT equipment can also be used in diamond treatment, so a mention of HPHT should be read in the context of the full report.
UNDERSTAND THE DETAILS
03 / CVD growth.
Chemical vapor deposition uses a low-pressure chamber with a carbon-containing gas. Energy activates the gas, allowing carbon to build a diamond crystal on a seed.
Growth can involve multiple stages. Some stones receive post-growth treatment; ask what the report discloses.
UNDERSTAND THE DETAILS
04 / Finish and assess.
The grown crystal is planned, cut and polished into a finished gemstone. A laboratory can identify origin and examine the finished stone.
There is no single production time or quality outcome that applies to every laboratory-grown diamond.