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Ferro-hornblende

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PDM854363

Ferro-hornblende

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Description
Locality: 
Carboneras, Almeria, Andalusia, Spain
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.9 × 7.9 × 3.2 cm
Largest Crystal: 
2.30cm
Weight: 
236.00gr
Description

Black prismatic crystals of ferro-hornblende in a whitish porphyry rock. This type of subvolcanic matrix is uncommon in this locality because they are usually found in altered volcanic tuffs.

Collected by Pablo Muñoz in 1988.

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Mineral Data
What's on the rock

Ferro-hornblende

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

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