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RM863   Calcite with dolomite and chalcopyrite

Sweetwater Mine, F-5 Area, Ellington, Reynolds Co., Missouri, United States of America

A very nice specimen from a classic American locality. A group of doubly terminated crystals showing parallel growth and curvatures on their faces and edges. They are translucent and have a delicate yellow color. With small rhombohedral crystals of dolomite, peppered by microcrystals of chalcopyrite.

Size: 9.2 x 5.8 x 3.8 cm.
Main crystal: 7.2 x 2.5 cm.