(9.8cm,  Knappenwand, Untersulzbachtal, Salzburg, Austria)

Epidote

Formula: Ca2(Al,Fe)Al2O(SiO4)(Si2O7)(OH)
System: Monoclinic
Color: Yellowish-green, green, …
Hardness: 6
Name: From the Greek “Epidosis” = “increase” in allusion to the crystal characteristic of one longer side at the base of the prism.

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