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Pyrope & Omphacite

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CLB90098

Pyrope & Omphacite

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Description
Locality: 
Vågsøy, Vestland, Norway
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 4.5 × 4.7 cm
Description

This is a garnet-peridotite or eclogite from the earth's mantle containing pyrope, omphacite, forsterite and possibly enstatite, diopside, spinel. Age 420 million years. Formed under high pressure whilst two tectonic plates collided.

Mineral Data
What's on the rock

Pyrope

Formula: 
Mg3Al2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
7.5
Streak: 
White
Type Locality: 
Czech Republic

Omphacite

Formula: 
(Ca,Na)(Mg,Al)Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.20
Hardness: 
5.0 - 6.0
Type Locality: 
Eclogite outcrops, Weißenstein, Stammbach, Münchberg Metamorphic complex, Franconia, Bavaria, Germany

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