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Magnesioferrite Forsterite & Pyrochlore Group

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SKY591849

Magnesioferrite Forsterite & Pyrochlore Group

Rare Mineral

Description Tabs

Description
Locality: 
Kaiserstuhl Area, Baden-Württemberg, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2 × 1 cm
Description

Black crytals of magnesioferrite associated to forsterite, koppite and apatite. Koppite is an old name for oxicalciopyrochlore.

Oxicalciopyrochlore is a mineral found in a very few localities worldwide.

Mineral Data
What's on the rock

Magnesioferrite

Formula: 
MgFe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Dark red
Type Locality: 
Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Forsterite

Formula: 
Mg2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic
Hardness: 
7.0
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Pyrochlore Group

Formula: 
A2Nb2(O,OH)6Z
Strunz: 
4
Crystal System: 
Isometric
Hardness: 
5 - 5.5
Colour: 
Brown, yellow-brown, reddish brown, orange, black
Streak: 
Light brown, yellow-brown

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