Mineral Species: Epidote

Chemical Formula: Ca2Fe(Al2O(OH)(Si2O7)(SiO4)

Chemical Name: Hydrous Calcium Iron-Aluminium Silicate

Mineral Class: Sorosilicate

Mineral Notes: Epidote is a species very often found in association with metamorphic areas. It is an important rock-forming mineral and often forms inclusions in granite. 

Description: Unusually large, columnar crystals of Epidote in matrix. Most have good terminations. The largest crystal shows some interior transparency. The strong glassy luster and bottle-green colour make this a very attractive display specimen.

Location: Knapperwand, Austria.