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Julgoldite & Calcite

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CLB34203

Julgoldite & Calcite

Rare Mineral

Description Tabs

Description
Locality: 
Kreimbach-Kaulbach Quarry, Lauterecken-Wolfstein, Kusel, Rhineland-Palatinate, Germany
Size Range: 
Cabinet (10-18 cm)
Size: 
8.3 × 10 × 10 cm
Largest Crystal: 
1.70cm
Description

Julgoldite covering calcite skalenohedrons. A new generation of calcite standing out of the Julgoldite jungle and there seems to be an apophyllite too (but could be yet another form of calcite too).

Not a killer specimen, but a good example from this famous locality, some great calcite crystals and only a few minor ticks on the surface.

Mineral Data
What's on the rock

Julgoldite

Synonym Of: 

Julgoldite-(Fe2+)

Formula: 
Ca2(Fe2+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0

Julgoldite-(Fe3+)

Formula: 
Ca2(Fe3+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH,O)2·H2O
Strunz: 
9.BG.20
Hardness: 
4.5

Julgoldite-(Mg)

Formula: 
Ca2(Mg,Fe2+)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0
Group Parent: 
Pumpellyite Group

Calcite

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

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