Green Diamond
Green diamonds are typically light in town and low in saturation. Their colour often appears muted, with a greyish or brownish cast. The hue is often confined to the surface and rarely extends through the entire diamond, which is why cutters try to leave as much of the natural rough around the girdle as possible. Natural fancy green diamonds derive their colour from exposure to gamma rays deep below the earth’s surface over a long period of time, possibly even as long as millions of years. This happens naturally; radiation displaced atoms from their normal position in the crystal lattice. Very rarely, hydrogen may also cause some greyish green stones to form. This can create an interesting subset of Green diamonds known as Chameleons. As the name suggests, Chameleons are naturally changeable stones whose shades shift when subjected to different temperatures.
Please note that a significant amount of treated diamonds exist on the market. The purpose of the treatment is to increase the colour.
