Ametrine jewelry displays two colors in one stone: the purple of amethyst and the golden-orange of citrine. This natural phenomenon occurs when trace iron oxidizes at different temperatures within a single quartz crystal. Most commercial ametrine comes from the Anahi Mine in Bolivia, the primary source since the 17th century. Our collection features these bicolor gems set in .925 sterling silver. Browse over 130,000 pieces with free US shipping on every order.
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Ametrine is a variety of quartz that contains both amethyst and citrine in one crystal. It forms when iron impurities oxidize at different temperatures in separate zones during crystal growth.
Nearly all gem-quality ametrine comes from the Anahi Mine in eastern Bolivia. This deposit has been the primary commercial source since Spanish colonists documented it in the 1600s.
Ametrine has a Mohs hardness of 7, which provides good scratch resistance for daily wear in rings, earrings, and pendants.