Amethyst Crystal - Single Point /Ametrine

An ametrine crystal from Bolivia. The boundary line geometry between the amethyst and citrine zones is particularly well visible in this piece.

The boundary line is individually oriented in each ametrine. It typically follows a crystallographically preferred plane.

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 worldwide is the Anahí Mine in the Pantanal wetlands, Bolivia. According to historical tradition, it was discovered in the 17th century by Spanish conquistadors.

The daughter of a local chieftain, named Anahí, is said to have been married to a conquistador and given him the mine as a dowry.