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Julgoldite-(Fe2+) & Calcite

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CLB115336

Julgoldite-(Fe2+) & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Kreimbach-Kaulbach Quarry, Lauterecken-Wolfstein, Kusel, Rhineland-Palatinate, Germany
Size Range: 
Cabinet (10-18 cm)
Size: 
16.2 × 7.5 × 5.2 cm
Description

Very good specimen with crusts and aggregates of dark green to black julgoldite on calcite crystals. On top some very nice and siny free-standing, newly formed calcite crystals. A lot of possibillities for trimming.

Mineral Data
What's on the rock

Julgoldite-(Fe2+)

Formula: 
Ca2(Fe2+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Crystal System: 
Monoclinic
Hardness: 
0.0
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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