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Pyrope Diopside & Omphacite

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CLB108980

Pyrope Diopside & Omphacite

Classic Locality

Description Tabs

Description
Locality: 
Måløy, Vågsøy, Vestland, Norway
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.8 × 1.3 cm
Description

This is a garnet-peridotite or eclogite from the earth's mantle containing pyrope, omphacite, diopside and possibly forsterite and enstatite. 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

Diopside

Formula: 
CaMgSi2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.15
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.5
Streak: 
white

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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