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Mgriite Clausthalite Umangite & Eucairite

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NEK1075686

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Description
Locality: 
Schlema-Hartenstein, Erzgebirge, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.15 × 0.1 × 0.1 cm
Description

Extremely rare (!!) Mgriite admixed with Eucairite, Umangite, Clausthalite, and Berzelianite on a small matrix of calcite. Type locality for Mgriite!

Mineral Data
What's on the rock

Mgriite

Formula: 
Cu3AsSe3
Strunz: 
2.LA.45
Hardness: 
4.5 - 5.0
Type Locality: 
Schlema-Hartenstein District, Erzgebirge, Saxony, Germany

Clausthalite

Formula: 
PbSe
Strunz: 
2.CD.10
Hardness: 
2.5 - 3.0
Type Locality: 
St Lorenz Mine, Burgstatt veins, Clausthal-Zellerfeld, Harz, Lower Saxony, Germany

Umangite

Formula: 
Cu3Se2
Strunz: 
2.BA.25
Crystal System: 
Tetragonal
Hardness: 
3.0
Streak: 
Black
Type Locality: 
Trogtal Quarries, Lautenthal, Harz, Lower Saxony, Germany

Eucairite

Formula: 
AgCuSe
Strunz: 
2.BA.50
Hardness: 
2.5
Streak: 
Shining
Type Locality: 
Skrikerum Mine (Skrickerum Mine), Valdemarsvik, Östergötland, Sweden

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After you win the bid on an item you are expected to pay within 72 hours, if you won't be able to pay this early please give me prior notice on payment date. All items are as described so generally no refunds or returns.

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