mineral

Ametrine

Ametrine (SiO2 - Silicon Dioxide with varied iron impurities)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs); Color: Bi-color purple and yellow/amber; Luster: Vitreous; Crystal Structure: Trigonal (hexagonal system); Cleavage: None; Specific Gravity: 2.65

Hardness: 7 (Mohs)
Color: Bi-color purple and yellow/amber
Luster: Vitreous

Identified March 14, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs); Color: Bi-color purple and yellow/amber; Luster: Vitreous; Crystal Structure: Trigonal (hexagonal system); Cleavage: None; Specific Gravity: 2.65

Formation & geological history

Formed through the hydro-thermal precipitation of silica in iron-rich environments. The unique color zones are produced by different oxidation states of iron within the crystal structure due to a temperature gradient during formation.

Uses & applications

Primarily used as a gemstone in jewelry (rings, pendants) and for crystal healing or metaphysical collections.

Geological facts

Natural ametrine is almost exclusively found in one location: the Anahi Mine in Bolivia. Legend says it was first introduced to Europe via a Spanish conquistador who received the mine as a dowry.

Field identification & locations

Identify by looking for distinct, non-blended zones of purple (amethyst) and yellow (citrine) in a single transparent crystal. Found specifically in Eastern Bolivia and some parts of Brazil.