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Phlogopite & Sanidine

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SER1134955

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Description
Locality: 
San Vito Quarry, Ercolano, Monte Somma, Somma-Vesuvius, Naples, Campania, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 2.4 × 2.5 cm
Description

a vug filled with colourless sanidine crystals hosts a cluster of brown phlogopite

Mineral Data
What's on the rock

Phlogopite

Formula: 
KMg3(AlSi3O10)(OH,F)2
Strunz: 
9.EC.20
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 3.0
Streak: 
White

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic - Prismatic
Hardness: 
6.0
Streak: 
White
Type Locality: 
Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany

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Start 17 Feb 18:00
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