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Fluorite Magnetite Nosean & Pyroxene Group

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ZLT1151369

Description Tabs

Description
Locality: 
In den Dellen Quarries, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.3 × 1 cm
Description

Very small "Christmas-tree" like sceletal fluorite aggregate in a vug with much larger magnetite crystals. (FOV) 0.32mm). Modified octahedrons of magnetite intergrown with pyroxene in a vug of a sanidinite. Also present is black pigmented noseanat lower left. (fov 6.5 mm)

Mineral Data
What's on the rock

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

Nosean

Formula: 
Na8(Al6Si6O24)(SO4)·H2O
Strunz: 
9.FB.10
Hardness: 
5.5
Type Locality: 
Sandkuhle, Maria Laach, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany

Pyroxene Group

Group Members: 
Clinopyroxene Subgroup
Orthopyroxene Subgroup

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