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Astrophyllite

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SHS590394

Astrophyllite

Description Tabs

Description
Locality: 
Eureka Tunnel, St Peters Dome, Cheyenne District, El Paso County, Colorado, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.2 × 2.3 cm
Description

Nice astrophyllite in matrix

Mineral Data
What's on the rock

Astrophyllite

Formula: 
(K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7
Strunz: 
9.DC.05
Crystal System: 
Triclinic
Hardness: 
3.0
Streak: 
Golden
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway