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Calcite Near Crystal Creek, Minnesota, USA 15 X 10 X 8 cm A group of scalenohedral calcites, the largest is 4 cm, sitting in a vug of greenish quartz. Found by my son Greg in a rock slide at a road cut through the North Shore basalt. (Author: John Nash)

Calcite
Near Crystal Creek, Minnesota, USA
15 X 10 X 8 cm
A group of scalenohedral calcites, the largest is 4 cm, sitting in a vug of greenish quartz. Found by my son Greg in a rock slide at a road cut through the North Shore basalt. (Author: John Nash)

Dimensiones: 600 x 414
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