Gemstone Glossary

Epidote

Epidote is best known among mineral collectors for its unique green color described as "pistachio", which is quite striking in well-colored specimens. The mineral is even called Pistacite for its color. The name Epidote is from the Greek ‘Epidosis’ meaning “Addition” or “Increase”. This may refer to the fact that some of the mineral's prism faces in a mass form are longer than others.


As well as the pistachio green, Epidote is found in other shades like: brownish green, black, yellow or gray. Composed of Calcium Aluminum Iron Silicate Hydroxide, [Ca2 (Al, Fe) 3(SiO4) 3(OH)], Epidote ranks 6 to 7 on the Moh’s Scale of Hardness with a Specific Gravity of 3.3 to 3.5. Epidote specimens are found in vitreous and transparent or translucent forms. Its crystals can be massive, or as drusy to radiating prismatic crystals.

Epidote is collected as a rare mineral specimen. Despite its hardness and deep color, Epidote is not commonly cut and polished as a precious stone because the crystals rarely are clear or large enough to facet. Thus, the ones that actually cut as gemstones are highly prized.

One of the most interesting locations for Epidote is the appropriately named Green Monster Mountain in Alaska. This privately owned and operated source produces splendid crystal specimens that are snapped up by private collectors and museums alike, the world over.

Epidote is one of the birthstones for those born under the sign of Gemini. By spiritual meaning, Epidote is noted for its ability of enhancing perception and intuition, supplementing personal power, and increasing spirituality and spiritual growth. When found associated with other minerals its properties are believed to be enhanced.