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Hornblende

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CLB613874

Hornblende

ex collection Otfried Kopp
Classic Locality

Description Tabs

Description
Locality: 
Haupen Valley, Finkenberg, Schwaz District, Tyrol, Austria
Class: 
Crystals on Matrix
Size Range: 
Museum (18cm plus)
Size: 
20.5 × 14.5 × 3.5 cm
Weight: 
1 656.00gr
Description

Very decorative specimen of crystalline hornblende on and in slate ('garbenschiefer' = 'caraway seed rock').

Mineral Data
What's on the rock

Hornblende

Synonym Of: 

Ferro-hornblende

Formula: 
☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

Magnesio-hornblende

Formula: 
☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

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