Ametrine

Raw Ametrine Jewelry, Handmade in Japan

Explore TROZO's raw ametrine necklaces, rings, ear cuffs and earrings — each built around a real, uncut ametrine rather than a cut and polished stone. Every piece is handmade in Japan, and as one-of-a-kind raw stone it is truly unique.

Ametrine (also Bolivianite) is a quartz-family variety, SiO₂, trigonal, Mohs 7. It is the rare stone in which amethyst (purple) and citrine (gold) coexist within one crystal, divided by a straight boundary along the crystal axes — its name a blend of the two. The color comes from the behavior of iron: the same Fe³⁺ becomes purple where it forms an Fe⁴⁺ color center under radiation and a temperature gradient during growth, and gold where it does not. The world’s only commercial source is the Anahí mine in eastern Bolivia, named for a 16th–17th-century Ayoreo princess.

TROZO works every ametrine unpolished, setting it so its natural colour and form lead the design — handmade in Japan, and no two raw stones alike.