mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Hardness is 6-7 on the Mohs scale. Typically displays pistachio-green, yellowish-green, or nearly black colors with a vitreous luster.

Identified October 30, 2026More mineral →

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Physical properties

Hardness is 6-7 on the Mohs scale. Typically displays pistachio-green, yellowish-green, or nearly black colors with a vitreous luster.

Formed through regional and contact metamorphism of igneous and sedimentary rocks, as well as hydrothermal alteration.

Primarily used as a gemstone for bead jewelry, cabochons, and as mineral specimens for collectors.

Epidote is the namesake of the epidote mineral group and its name derives from a Greek word meaning addition.

Identified by its characteristic pistachio-green color and monoclinic crystal habits, found globally in metamorphic terranes.

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Limonite

FeO(OH)•nH2O

Limonite

FeO(OH)•nH2O

Limonite

FeO(OH)•nH2O

Limonite

FeO(OH)•nH2O

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)