lab grown diamond parameter table

Parameter Description
Diamond Type Type IIa or IIb
Growth Method HPHT (High Pressure High Temperature)
Pressure Up to 6 GPa
Temperature Up to 2,300°C
Growth Rate Typically 0.01-0.1 mm/hour
Seed Crystal High-quality single crystal diamond
Catalyst Metallic solvent such as Fe-Ni-Co or a mixture of carbons
Gas Composition Typically methane or hydrogen mixed with a carbon source gas
Crystal Shape Can be controlled through the use of seed and growth process
Purity Can be higher than natural diamonds due to growth conditions
Color Can be controlled through the use of dopants or growth process
Size Can be grown up to several carats
Price Generally lower than natural diamonds, but varies depending on size, color, and quality


Parameter Description
Breeding method: Two methods, HPHT (High Pressure High Temperature) and CVD (Chemical Vapor Deposition).
raw material: Diamond seed (seed) and carbon source (for CVD method).
pressure: Generally between 50-70 kbar (HPHT method) or 0.1-1 kbar (CVD method).
temperature: Generally between 1200-1500°C (HPHT method) or 700-1100°C (CVD method).
time: Usually ranging from a few hours to a few days.
Metal catalyst: Some CVD methods need to use, such as Ni, Co, etc.
Diamond Yield: That is, the proportion of raw materials converted into diamonds, generally ranging from 0.1% to 50%.
Diamond Quality: The color, size, impurity content, hardness and other indicators of diamonds can be controlled and adjusted through different cultivation conditions.

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