Natural Green Diamonds

Green colour in natural diamonds results from radiation emitted by radioactive minerals over geological timescales, displacing carbon atoms to create vacancy defects that absorb red light and transmit green. Most natural greens carry colour only in a thin surface skin from shallower alpha exposure; uniform body colour throughout the stone is exceptionally rare. Saturation drives value, but a GIA natural-origin determination is equally essential: laboratory irradiation creates identical colour through the same physics.