This blog is a electronic museum of my collections of antiquities, ethnographic, first editions, retro pottery from the 1950's to early 1970's, shell, mineral and gemstone samples,fossils and other wonderful things! Comments are welcome on the objects including advice which will add to my own wonderment and knowledge.

Tuesday, July 1, 2014

Mineral Specimen: ADAMITE (Zinc Arsenate Hydroxide)

Chemical Composition:   Zn2AsO4OH
Provenance: Durango, MEXICO

Adamite occurs as a secondary mineral in the oxidized zone of zinc- and arsenic-bearing hydrothermal mineral deposits. It occurs in association with smithsonite, hemimorphite, scorodite, olivenite, calcite, quartz and iron and manganese oxides.

The yellow to bright lime-green colored crystals and druze along with its distinctive fluorescence make adamite a favorite among mineral collectors. Found in Mapimí, Durango, Mexico; Greece; and California and Utah in the United States.

Adamite was named after the French mineralogist Gilbert-Joseph Adam (1795-1881). It was first described in 1866 for an occurrence at the type locality of Chañarcillo, Copiapó Province, Atacama Region, Chile.

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