LaboratoryGrown Diamonds (Diamonds Grown in a Lab) | GIA
There are two main processes used to create laboratorygrown diamonds: 1. High Pressure, High Temperature (HPHT) With this method, laboratorygrown diamonds are produced using highpressure, hightemperature conditions similar to what natural diamonds experience in the earth. HPHT diamond growth occurs at pressures of 5–6 GPa (roughly ...