2.3" Yellow Calcite and Chalcopyrite Crystals on Dolomite - Missouri

Yellow Calcite and Chalcopyrite Crystals on Dolomite - Missouri #252131

This is a gorgeous, 2.3" wide association of yellow calcite, micro-chalcopyrite crystals, all on a rhombohedral dolomite crystal encrusted matrix. This mineral cluster was collected from the Sweetwater Mine in Reynolds County, Missouri, a site known for its stunning mineral associations.

Chalcopyrite is a brass-yellow colored mineral and an important copper ore. When weathered, chalcopyrite loses its metallic luster, turning a gray-green color. When exposed to acids, the tarnish can develop a red, blue, or purple iridescence: this acid-treated material is often sold under the name peacock ore.

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