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Sapphirine In Calcite

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HJZ599884

Sapphirine In Calcite

Classic Locality

Description Tabs

Description
Locality: 
Taolañaro, Anosy, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.5 × 2 cm
Largest Crystal: 
1.00cm
Description

This specimen contains a couple of dark navy blue crystals of sapphirine. Madagascar is known to produce the best specimens of this silcate species. No damage.

Sapphirine & Scapolite & Phlogopite in Calcite matrix

Anosy (Fort Dauphin) Region, Tuléar (Toliara) Province, Madagascar

Previous labels supplied (not photographed)
Mineral Data
What's on the rock

Sapphirine

Formula: 
(Mg,Fe)4-xAl4+x[Al4+xSi2-xO18]O2
Strunz: 
9.DH.45
Hardness: 
7.5
Type Locality: 
Fiskenæsset old harbour, Fiskenæsset (Fiskenaesset; Qeqertarsuatsiaat), Nuuk (Godthåb), Sermersooq, Greenland

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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