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Dolomite & Calcite

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MGR748475

Dolomite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Black Rock, Lawrence County, Arkansas, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 2.6 × 2.3 cm
Description

A sharp termianted light ivory colored ad glossy calcite perched on light pink well shaped dolomite crystals. Typical for the locality, but in remarkable dimension for Calcite and in excellent quality. Very aesthetc assemble!

Mineral Data
What's on the rock

Dolomite

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

Calcite

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