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Orcelite Gersdorffite & Millerite

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SKY519618

Orcelite Gersdorffite & Millerite

Rare Mineral

Description Tabs

Description
Locality: 
Heimberg Quarry, Wolfshagen, Lautenthal, Goslar, Lower Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.6 × 1.5 cm
Description

Bronze colored crystals of the extremely rare mineral orcelite, a nickel arsenide, associated to black gersdorfite,  golden millerite and probably green annabergite. Analyzed specimen by the original supplier.

Mineral Data
What's on the rock

Orcelite

Formula: 
Ni5-xAs2, x ~ 0.25
Strunz: 
2.AB.10
Crystal System: 
Hexagonal
Hardness: 
0.0
Type Locality: 
Tiébaghi Cr mine, Tiébaghi Massif, Koumac Commune, Northern Province, New Caledonia

Gersdorffite

Formula: 
NiAsS
Strunz: 
2.EB.25
Crystal System: 
Isometric
Hardness: 
5.5
Type Locality: 
Zinkwand, Obertalbach valley, Schladminger Tauern, Schladming, Styria, Austria

Millerite

Formula: 
NiS
Strunz: 
2.CC.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 3.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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