mineral

Ametrine

Ametrine (SiO2 - Silicon Dioxide with varied iron impurities)

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 →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

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.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral