69th B.P.S.C. (Pre) 2023
In the context of lab-grown diamonds (LGDs), what is used as a diamond seed?
aWhite sapphire
bMoissanite
cGraphite✓ Correct
dCubic zirconia (CZ)
Explanation
In the context of laboratory-grown diamonds (LGD), graphite is used as the diamond seed. These diamonds are mainly produced by two methods: the High Pressure–High Temperature (HPHT) method or Chemical Vapor Deposition (CVD).
general-science