This transparent quartz has colors of both amethyst and citrine. Sometimes called amethyst-citrine.
Whether projecting from pegmatite walls or encrusting cavities in volcanic rock, quartz abounds worldwide. People have used quartz in jewelry for thousands of years. When quartz displays the colors of amethyst and citrine in a single gem, the material is called ametrine or amethyst-citrine. Before preforming, ametrine is often examined under a bright light to reveal the best purple/yellow orientation of the rough for subsequent cutting. This gem is very rare. Ametrine’s only commercial source is the Anahi mine in Bolivia.