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Corundum Spinel & Margarite

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BCK653625

Corundum Spinel & Margarite

Ted Bartels collection
Classic Locality

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Description
Locality: 
Sterling Hill, Ogdensburg, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 4.6 × 2.7 cm
Description

You are bidding on a small sample with a fantastic display of plates of bright pink corundum with numerous pale pink octahedra of spinel all growing on light blue margarite plates. The crystals were exposed by etching of calcite. Rich sample of corundum from the Ted Bartels. 

Mineral Data
What's on the rock

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
9.0
Streak: 
White

Spinel

Formula: 
MgAl2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
7.5 - 8.0

Margarite

Formula: 
CaAl2(Al2Si2O10)(OH)2
Strunz: 
9.EC.30
Hardness: 
4.0
Type Locality: 
Großer Greiner, Zemmgrund, Zillertal, North Tyrol, Tyrol, Austria

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$10
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Start 13 May 18:00
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