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Native Selenium Rostite & Bassanite

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SKY179778

Native Selenium Rostite & Bassanite

Anthroprogenic
Rare Mineral

Description Tabs

Description
Locality: 
Anna Mine, Alsdorf, Cologne, North Rhine - Westphalia, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.7 × 0.8 cm
Description

Exceptionally nice and well formed native selenium crystals from this classic locality in Germany, that has revolutioned the mineral market for the quality of the selenium crystals, that are already a classic. This sample, in addition, it's outstanding because it contains three additional rare species in white crystals (last photo) : rostite, bassanite and alunogen. All three species are confirmed by analyses (see photo), a copy of it (including alunogen by SEM/EDS and Se by Raman) will be sent to the buyer.

Mineral Data
What's on the rock

Selenium

Formula: 
Se
Strunz: 
1.CC.10
Crystal System: 
Trigonal
Hardness: 
2.0
Streak: 
red

Rostite

Formula: 
Al(SO4)(OH)·5H2O
Strunz: 
7.DB.10
Hardness: 
0.0
Type Locality: 
Kladno Mine (Nejedlý I Mine; Zdeněk Nejedlý Mine; Schoeller Mine; Schöller Mine), Libušin, Kladno, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

Bassanite

Formula: 
CaSO4·0.5H2O
Strunz: 
7.CD.45
Crystal System: 
Orthorhombic
Hardness: 
0.0
Colour: 
White
Type Locality: 
Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Seller Information

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