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Hornblende

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CR190013

Hornblende

With Antique Label

Description Tabs

Description
Locality: 
Kostomlaty pod Milešovkou, Teplice, Ústí nad Labem Region, Czech Republic
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5 × 3.5 cm
Description

Large black hornblende crystals in basalt matrix from Bohemia.

Very old specimen with two wonderful old labels - acquired 1881

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