Pyrolusite
Pyrolusite pseudomorph after
calcite
Origin: Ilfeld, Harz Mountains, Germany
Sample size: 4.5 x 3 x 5 cm
Origin: Malvern, Pennsylvania, U.S.A.
Sample size: 5 x 4 x 3 cm
Manganese oxide nodules
Origin: Tiger, Arizona, U.S.A.
Sample size: from 30 to 22 mm
Origin: Upper Peninsula, Michigan, U.S.A.
Ex. Gene Tribbey Collection, ex Cranbrook Institute
Sample size: 8.5 x 4.5 x 6.5 cm
Origin: Montreal mine, Montreal, Iron County, Wisconsin, U.S.A.
Ex. Gene Tribbey Collection
Sample size: 5 x 3 x 4 cm
:Pyrolusite as pseudomorph replacement of fibrous manganite to 8 mm in length.
Origin: Kamataka, India
Sample size: 5.5 x 4 x 3.1 cm
Dealer in
fine mineral specimens
This specimen consists of milky white crystals of
calcite
with black splotches of pyrolusite.
Origin: Tsumeb Mine, Tsumeb, Namibia
Sample size: 7.6 x 6.7 x 5.2 cm
A spray of flat lying crystals of pyrolusite
Origin: 8.5 x 6 x 4 cm
Ex. Frank Edwards collection
Sample size: 1.8 cm in length
John Veevaert, Trinity Mineral Co
Origin: Km-3 Mine, Lavrion Mines, Lavrion (Laurion; Laurium), Lavrion
District, Attikí (Attica; Attika) Prefecture, Greece
Sample size: crystals to 0.7 mm on oxidised
siderite
Owner: Steve Rust
Origin: Fullabrook Mine, Braunton, Devon, U.K.
Sample size: 5 x 6 x 9 cm
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