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Earth lab datasite

Dolomite
Carbonate with quartz
calcium magnesium carbonate
Ca Mg (CO3)2
Scale bar = 1 centimetre
cleavage: Perfect rhombohedral
crystal system: Trigonal
hardness 3.5 - 4.0
relative density 2.8 - 2.9
Lower Coal Measure Sandstone, Park Colliery, nr. Tirydial, S. Wales
24 I 7