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Calcite, (w. Hematite and Malachite)


Chemistry: CaCO3
Size: 100 mm.
Owner: Geoff Krasnov
Photographer: Geoff Krasnov

Composite rhombohedral calcite crystals (to 70 mm), coloured brick-red by minute inclusions of iron oxide, probably hematite (?). The calcite rests on a sliver of similarly-coloured matrix, with minor malachite providing an attractive colour contrast.