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0 item @ $0.00  

Pumpellyite-(Mg) var. chlorastrolite

#56665

Pumpellyite-(Mg) var. chlorastrolite

#56665
Availability
Sold
Size
0.6 x 0.3 x 0.3 cm - Thumbnail 
Formula
Ca2MgAl2(SiO4)(Si2O7)(OH)2·H2O (RRUFF)
Locality
Isle Royale, Lake Superior, Keweenaw Co., Michigan, United States

Polished cabs of this rare, weird Pumpellyite-(Mg) variety chlorastrolite. 

Pumpellyite-(Mg)

Formula
Ca2MgAl2(SiO4)(Si2O7)(OH)2·H2
Crystal System
Monoclinic 
Crystal Habit
Spherical, Fibrous, Massive - Lamellar 
Cleavage
Good, Good, None 
Luster
Vitreous (Glassy) 
Color
blue green, olive green, brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Sub Conchoidal 
Hardness
5.5 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection

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