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Rock formation: It forms as a secondary mineral in the oxidation zones of lead ore deposits
It is found in the oxidized zones of cobalt bearing ore deposits
5cm x 5cm x 3
Smoky quartz from minas gerais
Cummingtonite Rock formation: It forms asCummingtonite from lead mining district Lawrence county South Dakota USA Size 6. 2cm x 3. 1cm x 2. 8cm Weight 63g You will receive the item in the photo Cummingtonite is a magnesium iron inosilicate amphibole mineral. Crystal system Monoclinic. It frequently appears in radiating fibrous or acicular (needle like) crystal habits. Mineral class Silicates. Specifically the inosilicate subclass and amphibole group. Rock formation commonly found in
