Calcite
Description: Hexagonal prisms of calcite crystals several cms long, transparent and sparry. These sit on a layer of finer, inter-locked crystals of a milky white mineral which is possibly dolomite. One face of the sample is blue-grey limestone suggesting that the crystals formed in a vug within the Castletown limestones.
Measurements: 7 1/2 inch x 3 3/4 inch x 2 1/2 inch
Taxonomic name: Castletown Group: Sparry calcite
Collection: Natural History Geology Collection
ID number: 1956-0021
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