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RM862   Calcite with dolomite and chalcopyrite

Sweetwater Mine, Ellington, Reynolds, Missouri, United States of America

A very nice specimen from a classic American locality. A group of interpenetrated calcite crystals showing curvatures on their faces and edges. They are transparent to translucent and have a delicate yellow color with zonation. With small rhombohedral crystals of dolomite, peppered by microcrystals of chalcopyrite.

Size: 9.0 x 8.5 x 7.5 cm.
Main crystal: 5.2 x 1.8 cm.