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Aragonite & Dolomite On Quartz

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CLB125369

Aragonite & Dolomite On Quartz

from my personal collection, found by E. Stark

Description Tabs

Description
Locality: 
Fuchsberg Quarry, Piesport, Bernkastel-Wittlich, Rhineland-Palatinate, Germany
Size Range: 
Cabinet (10-18 cm)
Size: 
10.8 × 8.4 × 5 cm
Description

Very nice shiny white acicular aragonite crystals and brownish dolomite crystals (encrusted by siderite?) on milky quartz. A large damaged quartz crystal is tinted by red haematite.

Mineral Data
What's on the rock

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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