All posts tagged "psilomelane"

  • Gem Profile July 6: Psilomelane

    by Rose Marion, Wire-Sculpture.com Psilomelane Psilomelane, also rarely called psilomelanite and black hematite, is an umbrella name for manganese oxides, which are black stones. The name was chosen in 1758 and comes from the Greek for "smooth"...

    • Posted July 6, 2012
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