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Astrophyllite

#PD33821

Astrophyllite

#PD33821
Availability
Sold
Size
5.5 x 4 x 2 cm - Sm Cabinet 
Formula
K2NaFe2+7Ti2(Si4O12)2O2(OH)4F (RRUFF)
Locality
Låven, Langesundsfjorden, Larvik, Vestfold, Norway

Deep reddish brown long bladed crystals to 3.5cm. University of Chicago label - see provenance tab.

Astrophyllite

Formula
K2NaFe2+7Ti2(Si4O12)2O2(OH)4
Crystal System
Triclinic 
Crystal Habit
Bladed, Stellate, Crystalline - Fine 
Cleavage
Perfect, None, None 
Luster
Adamantine - Pearly 
Color
brown, brownish red, bronze yellow, gold yellow 
Streak
yellowish brown 
Class
Triclinic - Pedial 
Fracture
Brittle 
Hardness
3-3.5 

Data courtesy of Webmineral.

Collection
Phillips Collection

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