Cuprian Adamite
Image: <a href="//commons.wikimedia.org/wiki/User:Archaeodontosaurus" title="User:Archaeodontosaurus">Didier Descouens</a> (CC BY-SA 3.0)
Mineral NameCuprian Adamite
Chemical Formula(Zn,Cu)2(AsO4)(OH)
Mohs Hardness3.5
Crystal Systemorthorhombic
Lustervitreous
Streak Colorwhite
Cleavagedistinct on {101}
Fractureuneven to subconchoidal
Specific Gravity4.3
Colorsgreen, light green, white
Transparencytranslucent
Type LocalityOjuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico
Mineral GroupArsenates
Usescollector
Associated Mineralslimonite, smithsonite, hemimorphite, scorodite
Rarityuncommon
Description
This specimen showcases numerous bright green to light green, translucent adamite crystals forming a sparkling druzy layer on a reddish-brown iron oxide matrix. The crystals are well-formed and exhibit a distinct vitreous luster.
Geological Context
Adamite is a secondary mineral that forms in the oxidized zone of zinc-arsenic ore deposits, often found in arid environments. Its formation is typically associated with the alteration of primary zinc and arsenic-bearing minerals.
