mineral
Ametrine
Ametrine (SiO2 - Silicon Dioxide with varied iron impurities)
AI-generated identification · may be incorrectHardness: 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
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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.
