Ametrine unites amethyst and citrine in a single bicolor quartz crystal — purple and golden zones meeting in one stone. The world's commercial source is essentially a single mine, Anahí in Bolivia, which makes fine ametrine a genuine geological curiosity. Hardness 7, ideal for bold fancy cuts that showcase the color boundary.When ametrine is available at GEMIC Institute it is natural, laboratory-certified and filmed stone by stone. Contact us to be notified of new arrivals.