Ametrine

Ametrine is quartz that grew with two faces of itself in one crystal: the purple of amethyst on one side, the gold of citrine on the other, meeting in a clean line down the middle. It is a single mineral — silicon dioxide — whose iron impurities happened to oxidize differently across the crystal, a geological coincidence that produces a genuinely two-toned gem.

Almost all natural ametrine in the world comes from a single source: the Anahí mine in Bolivia. At Mohs 7 it shares quartz’s easy durability, and cutters make a craft of orienting and faceting it to balance the purple and gold — some emphasize a crisp split, others a gradient blend.

Color

Treatments

Fine ametrine from the Anahí source is naturally bicolor and untreated — that natural origin is part of its appeal. Synthetic ametrine and heat-zoned imitations exist; we sell and disclose natural material.

Daily wear

Like all quartz, ametrine is an easy everyday stone at Mohs 7 — rings, earrings, pendants. The two-tone effect is best shown in larger, open cuts (emerald and elongated cuts are popular) where both colors have room to read. Warm soapy water and a soft brush keep it bright.