Conichalcite

specimen number:
2063177

location:
Ojuela Mine, Mapimi, Durango, Mexico

description:
Attractive green micro crystallized conichalcite very thick across the top of matrix with minor calcite. In good condition, an excellent example for the species. The specimen comes with a previous label from the collection of Ray DeMark. He acquired the piece in Mexico in 1974.

The Ojuela Mine, located in Mapimi, Durango, Mexico, was discovered by Spanish prospectors in 1598 and operated intermittently for over 350 years before closing commercially in 1932. Geologically, the deposit is hosted within deformed Cretaceous limestone units that have been intruded by Tertiary igneous rocks, creating an extensive hydrothermal pipe and vein system. Intense secondary oxidation processes acting on primary sulfide mineralization have produced a world-renowned zone of rich secondary mineral assemblages, making the mine famous for its exceptional variety of colorful arsenates, carbonates, and oxides.

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