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Actinolite with Pyrite

#PD41584

Actinolite with Pyrite

#PD41584
Availability
Sold
Size
10 x 7 x 5 cm - Cabinet 
Formula
Ca2(Mg,Fe2+)5Si8O22(OH)2 (RRUFF)
Locality
French Creek mines, Chester Co., Pennslyvania, United States

Dark green columnar Actinolite crystals to 1cm freen standing with octahedral Pyrite.

Actinolite

Formula
Ca2(Mg,Fe2+)5Si8O22(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Bladed, Radial, Fibrous 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous (Glassy) 
Color
green, green black, gray green, black 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Splintery 
Hardness
5.5 

Data courtesy of Webmineral.

Collection
Phillips Collection

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