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Psilomelane

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Colour:
Iron-black
Lustre:
Sub-Metallic, Dull
Hardness:
5 - 6
Specific Gravity:
4.7 - 4.72
Name:
From the Greek ψιλός (psilos) "smooth" or "bald", and μέλας (melas) "black" in allusion to the form and colour.
Obsolete group name for hard black Manganese Oxides.

Visit gemdat.org for gemological information about Psilomelane.


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Classification of PsilomelaneHide

4/X.0-0

4 : Oxides & Hydroxides
X : Unclassified oxides
0 :

Physical Properties of PsilomelaneHide

Sub-Metallic, Dull
Transparency:
Opaque
Colour:
Iron-black
Streak:
Brownish black to black, shiny
Hardness:
5 - 6 on Mohs scale
Density:
4.7 - 4.72 g/cm3 (Measured)    0.42 g/cm3 (Calculated)

Synonyms of PsilomelaneHide

Other Language Names for PsilomelaneHide

Varieties of PsilomelaneHide

Nickeloan PsilomelaneA nickel-bearing variety of psilomelane.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite14 photos of Psilomelane associated with Calcite on mindat.org.
Pyrolusite10 photos of Psilomelane associated with Pyrolusite on mindat.org.
Vanadinite8 photos of Psilomelane associated with Vanadinite on mindat.org.
Quartz7 photos of Psilomelane associated with Quartz on mindat.org.
Goethite7 photos of Psilomelane associated with Goethite on mindat.org.
Baryte7 photos of Psilomelane associated with Baryte on mindat.org.
Amethyst7 photos of Psilomelane associated with Amethyst on mindat.org.
Wulfenite5 photos of Psilomelane associated with Wulfenite on mindat.org.
Hematite4 photos of Psilomelane associated with Hematite on mindat.org.
Limonite4 photos of Psilomelane associated with Limonite on mindat.org.

Related Minerals - Nickel-Strunz Grouping (8th Edition)Hide

4/X.0-0Murataite-(Y)(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 Iso. m3m (4/m 3 2/m) : Fm3m
4/X.0-0Polymignite(Ca,Fe,Y,Th)(Nb,Ti,Ta,Zr)O4Orth.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for PsilomelaneHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Wallerius (1747) 268.
Haidinger (1827) Royal Society of Edinburgh, Transactions: 11: 129.
Egleston (1887) U.S. National Museum Bulletin 33: 137.
Krusch (1907) Zeitschrift für praktische Geologie, Berlin Halle a.S.: 15: 129.
Hintze (1929) 1(3A): 3597.
Ramsdell (1932) American Mineralogist: 17: 143.
Vaux (1937) Mineralogical Magazine: 24: 521.
Palache, Charles, Harry Berman & Clifford Frondel (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 668-670.
Fleischer, M. (1960) Studies of the manganese oxide minerals: III: Psilomelane: American Mineralogist: 45: 176-187.
Mineralogical Magazine (1965) 34: 634-655.

Internet Links for PsilomelaneHide

Localities for PsilomelaneHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListShow