Hydrated carbonate, markeyite group
Specific gravity: 2.70
Hardness: 1½ to 2
Colour: Pale yellow–green
Lumineacence: Bright bluish white fluorescence with a 405 nm laser
Natromarkeyite is a relatively new mineral, approved in 2019 and to date (May 2022) reported only from the type
At the type locality, the Markey Mine, Red Canyon Mining District, San Juan County, Utah, USA, natromarkeyite and pseudomarkeyite were found as secondary phases on bitumen (asphaltum). Natromarkeyite occurred as pale yellow-green untwinned blades and tablets to 0.2 mm (MM 84.5.753-765).
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