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Calcite

Koma

Niihori, Hidaka city, Saitama pref., Japan

Source for Quick lime and Sodium cyanide

Calcite

Field of view: 5 mm. Calcite twins. Butterfly-shaped twins are formed by thin platy calcite crystals.

Recovered from an open space of a calcite vein in the Early Cretaceous calcareous sandstone.

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