Amethyst Crystal - Single Terminated /Ametrine

An ametrine crystal from Bolivia with individual color-banding geometry. The boundary between amethyst and citrine runs along an inclined plane.

The color banding between amethyst and citrine follows its own unique geometry in each ametrine. Oblique or straight dividing lines are a site-specific characteristic of the individual crystal.

Ametrine is a geologically unique variety of quartz: purple amethyst and yellow citrine in a single crystal, separated by a sharp geometric boundary line. The only commercially viable deposit in the world is the Anahí mine in the Pantanal wetlands, Bolivia.

According to legend, the Anahí mine was discovered in the 17th century by Spanish conquistadors. The daughter of a chieftain, named Anahí, is said to have married a conquistador and given him the mine as a dowry.