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Cordierite & Muscovite

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SER1008159

Cordierite & Muscovite

Description Tabs

Description
Locality: 
Funtanafigu Quarry, Marrubiu, Oristano Province, Sardinia, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 4.5 cm
Description

some yellow-grey prisms of cordierite on vug with orange platy muscovite crystals

Mineral Data
What's on the rock

Cordierite

Formula: 
(Mg,Fe)2Al3(AlSi5O18)
Strunz: 
9.CJ.10
Crystal System: 
Orthorhombic
Hardness: 
7.0 - 7.5
Type Locality: 
Großer Arber, Bayerisch Eisenstein, Lower Bavaria, Bavaria, Germany

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White