Cyanotrichite

Curite

Cuprite

Cumengeite

Cubanite

Cronstedtite

Crocoite

Crocidolite

Creedite

Covellite

Corundum

Cornetite

Cordierite

Copper

Cookeite

Connellite

Columbite

Calcite

Azurite

Geode

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