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My favorite minerals:
Azurite~Chalcopyrite~Dioptase~Opal~Rhodochrosite~
Tourmaline
Sphalerite with Galena and Chalcopyrite from Colorado by Dan Weinrich

Sphalerite with Galena and Chalcopyrite from Colorado

by Dan Weinrich

Fluorite with Barite and Chalcopyrite from Illinois by Dan Weinrich

Fluorite with Barite and Chalcopyrite from Illinois

by Dan Weinrich

Fluorite with Calcite and Chalcopyrite from Illinois by Dan Weinrich

Fluorite with Calcite and Chalcopyrite from Illinois

by Dan Weinrich

Chalcopyrite with Quartz, Pyrite, & Calcite from Mexico by Dan Weinrich

Chalcopyrite with Quartz, Pyrite, & Calcite from Mexico

by Dan Weinrich

Chalcopyrite with Quartz, Pyrite, & Calcite from Mexico by Dan Weinrich

Chalcopyrite with Quartz, Pyrite, & Calcite from Mexico

by Dan Weinrich

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