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Magnetite With Nepheline On Quartz Psm Calcite

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CLB107668

Magnetite With Nepheline On Quartz Psm Calcite

Classic Locality

Description Tabs

Description
Locality: 
Jebel Bou-Agrao, Tamazeght, Khénifra Province, Béni Mellal-Khénifra Region, Morocco
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 3.6 × 3.4 cm
Description

Highly lustrous, black metallicmagnetite crystals and smaller, brown nepheline crystals on sandy quartz pseudomorph after calcite scalenohedrons. A very rare and interesting specimen.

Mineral Data
What's on the rock

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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