Mineral description : Ferro-anthophyllite

Ferro anthophyllite from Norberg.

Mineral class	Silicates : Inosilicates : Cummingtonite - Anthophyllite group.
Chemical formula	(Fe,Mg)7(OH,Si4O11)2
Crystal system	Orthorombic.
Habitus	Radiating aggregates, needle like crystals and fibrous aggregates.
Cleavage	Perfect in two directions with an angle of 124 degrees, uneven fracture.
Hardness	5.5-6
Density
Color
Streak
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Description
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Associates
Notes	The mineral anthophyllite is divided into three separate minerals. Magnesio-anthophyllite or anthophyllite, magnesia rich. Ferro-anthophyllite, iron rich. Sodium-anthophyllite, containing sodium.
Locations	At least one locality exists in Sweden. Stripåsen, Norberg, Västmanland. As grayish green radiating aggregates in schist.

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