Bill Bagley Minerals

Bill Bagley Rocks and Minerals

Minerals / Astrophyllite.

Astrophyllite is quite a rare mineral.      It is a hydrous potassium iron silicate with the very long formula  ( K,Na )3(Fe++,Mn)7Ti2Si8O24(O,OH)7   It's name is derived from two Greek words, astron meaning star, and phyllon meaning leaf, and these descriptions are easily observed in the specimen. The crystals are described as bladed  with a sub metallic shine dependant on the viewing angle. The whole of the specimen is a radiating, stellate, aggregate, with glimpses of the sub metallic shine, within a light coloured felsic matrix. Unfortunately it's origin is unknown. 

Astrophyllite. Bill Bagley Rocks and Minerals



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