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Actinolite & Magnetite

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ZLT210198

Actinolite & Magnetite

Description Tabs

Description
Locality: 
Wallhorn Alp, Timmelbach, Prägraten, Virgen Valley, Tyrol, Austria
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.7 × 3.3 × 3.3 cm
Description

Crystals of actinolite with magnetite originally covered by calcite. Calcite dissolved with Acetic acid. Collected from the dumps of a "Sphene" cleft in 1969.

Mineral Data
What's on the rock

Actinolite

Formula: 
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Crystal System: 
Monoclinic - Prismatic
Hardness: 
5.0 - 6.0
Streak: 
White

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

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