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Pyrrhotite Biotite & Nepheline

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SLN646677

Pyrrhotite Biotite & Nepheline

Description Tabs

Description
Locality: 
Jebel Bou-Agrao, Tamazeght, Khénifra Province, Béni Mellal-Khénifra Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
5.4 × 7.3 × 6.8 cm
Weight: 
318.00gr
Description

Nice specimen from Morocco of pyrrhotite in pseudo-hexagonal crystals of excellent brightness in association with biotite in crystals reunited in black hexagonal packages and small creamy white nepheline crystals. 

Mineral Data
What's on the rock

Pyrrhotite

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

Biotite

Group Parent: 
Mica Group

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

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