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Magnesio-hornblende & Pyrrhotite

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CHP916234

Magnesio-hornblende & Pyrrhotite

Classic Locality

Description Tabs

Description
Locality: 
Montijos Quarry, Monte Redondo, Leiria, Leiria District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.8 × 1.5 cm
Description

specimen with some very nice prismatic greenish crystals of magnesio-hornblende with an exagonal gray metallic cryrstal of pyrrotine.

c. 4497

Mineral Data
What's on the rock

Magnesio-hornblende

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

Pyrrhotite

Formula: 
Fe1-xS (x = 0 to 0.17)
Strunz: 
2.CC.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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