Adamite

specimen number:
2063613

location:
Ojuela Mine, Mapimi, Durango, Mexico

description:
The top of this matrix is mostly covered with attractive yellow green lustrous crystal groupings of adamite measuring to 2.0 cm in size. All of the prominent crystals are in very good condition. The only damage present is along the extreme edges of the matrix, this a result of removing the piece from the pocket within the mine. Brilliantly fluorescent under shortwave ultraviolet light. The specimen comes with a previous label from the collection of Ray DeMark. He acquired the piece while in Mexico in 1976.

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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