3.2" Green Epidote, Quartz and Byssolite - Morocco

This is a cluster of dark green epidote crystals in bow tie and fan shaped aggregates, clustered on a quartz encrusted matrix. When viewing closely between these crystals, small fibrous, olive-green clusters of byssolite. The specimen was collected at Imilchil in the Er Rachidia Province of Morocco.

Epidote is a green silicate mineral that is commonly found in regionally metamorphosed rocks. It often forms lustrous, elongated, and interconnected crystals that are highly coveted by collectors. While nearly all epidote is green, it may take on many different shades and tones from yellowish to deep green.

Quartz is the name given to silicon dioxide (SiO2) and is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich environments--usually igneous rocks or hydrothermal environments like geothermal waters--at temperatures between 100°C and 450°C, and usually under very high pressure. In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when water freezes. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.
Epidote, Quartz & Amphibole Supergroup (var. Byssolite)
Imilchil, Er Rachidia Province, Morocco.
Specimen 3.2" long