mineral

Epidote

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

Hardness of 6-7 on Mohs scale, pistachio-green to dark green color, vitreous luster, and monoclinic crystal system.

Identified October 22, 2026More mineral →

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Physical properties

Hardness of 6-7 on Mohs scale, pistachio-green to dark green color, vitreous luster, and monoclinic crystal system.

Forms through hydrothermal alteration of igneous and metamorphic rocks, as well as in skarns.

Used primarily as a mineral specimen for collectors and occasionally cut into cabochons for jewelry.

Its name derives from the Greek word for 'increase,' referring to the base of its crystal prisms being longer than the other.

Identified by its distinctive pistachio-green color and columnar or granular habit, commonly found in localities like Austria, Pakistan, and the USA.

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Limonite

FeO(OH)•nH2O

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Feldspar

Feldspar Group (Tectosilicate, e.g., KAlSi3O8)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite