Edenite

edenite

titanite

chondrodite

mica

Images

Formula: NaCa2Mg5(Si7Al)O22(OH)2
Inosilicate (chain silicate) amphibole
Specific gravity: 3.00 to 3.06 (Webmin)
Hardness: 5 to 6
Streak: White
Colour: Green, brown, white
Common impurities: Ti,Mn,K,P
Environments:

Plutonic igneous environments
Metamorphic environments

Edenite occurs in intermediate plutonic igneous rocks and in medium-grade metamorphic rocks such as amphibolite and marble (HOM).

Localities

Amity, Town of Warwick, Orange county, New York, USA, is an area of granite intrusions into marble and associated gneiss. The marble is mostly composed of white crystalline calcite that often has small flakes or spheres of graphite and phlogopite. Edenite is an uncommon amphibole that occurs associated with phlogopite as stubby weathered crystals to 7 cm in matrix (R&M 96.5.436).

At Edenville, Town of Warwick, Orange county, New York, USA, edenite is associated with titanite, mica and chondrodite (HOM).

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