The name Psilomelane was discredited as a distinct mineral variety but the name is still used as group name for hard black manganese oxides of which Romanechite and Hollandite are components. Psilomelane means smooth and black in Greek which aptly describes its appearance. It is often found in botryoidal masses with submetallic luster.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Over The Limit 2.110-2.260
Brownish Black To Black, Shiny
Psilomelane is sometimes botryoidal and might have pyrolusite bands or swirls.
Dull, Submetallic, Metallic
Countries of Origin
Russian Federation; Sweden; Belgium; Unknown; China; United States of America; Mexico; France; Germany; India