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Iceland sparA specimen of Iceland spar from Rodefjord, Iceland. Transparent crystal composed of the mineral, calcite (calcium carbonate) which has unusual property of double refraction
Calcite (Calcium Carbonate) variant iceland sparA cleaved rhomb of iceland spar showing double refraction from near Eskifjordr, Iceland
Calcite (Iceland spar)A specimen of Iceland spar from Rodefjord, Iceland. Transparent crystal composed of the mineral, calcite (calcium carbonate) which has unusual property of double refraction
