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Violan

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About ViolanHide

Formula:
CaMgSi2O6
Colour:
Purple, reddish purple, bluish purple
Lustre:
Sub-Vitreous, Resinous, Waxy, Greasy
Hardness:
6
Specific Gravity:
3.233
Name:
Named in 1838 by August Breithaupt for the color of the mineral.
A variety of Diopside

Purple to blue purple diopside or omphacite colored by manganese. Mauve colored diopside, owing its color to titanium, is not violan. Because of the bright purple color, violan is probably manganian and not manganoan. cf. Johannsennite.

Visit gemdat.org for gemological information about Violan.


Classification of ViolanHide

Discredited

Physical Properties of ViolanHide

Sub-Vitreous, Resinous, Waxy, Greasy
Transparency:
Transparent, Translucent
Colour:
Purple, reddish purple, bluish purple
Comment:
Due to Mn3+
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
{110}
Fracture:
Irregular/Uneven, Splintery
Density:
3.233 g/cm3 (Measured)    

Chemical Properties of ViolanHide

Formula:
CaMgSi2O6

First Recorded Occurrence of ViolanHide

General Appearance of First Recorded Material:
Bluish purple to bright purple resinous masses with rare crystal form.
Associated Minerals at First Recorded Locality:

Synonyms of ViolanHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Braunite4 photos of Violan associated with Braunite on mindat.org.
Omphacite2 photos of Violan associated with Omphacite on mindat.org.
Calcite1 photo of Violan associated with Calcite on mindat.org.
Alurgite1 photo of Violan associated with Alurgite on mindat.org.
Hexagonite1 photo of Violan associated with Hexagonite on mindat.org.

Fluorescence of ViolanHide

Not fluorescent in UV

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 ViolanHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mottana, A., Rossi, G., Kracher, A., Kurat, G. (1979): Violan revisited: Mn-bearing omphacite and diopside. Tschermaks Mineral. Petrograph. Mitt. 26, 187–201.

Internet Links for ViolanHide

Localities for ViolanHide

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 ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • North Rhine-Westphalia
    • Sauerland
      • Iserlohn
        • Letmathe
Bender, D. and Krimmelbein, W. (1994) Aktuelle Übersicht: Mineralien der Zinkhütte Genna/Sauerland. Stand Juni 1994. Mineralien-Welt, 4/94, 10.
Greece
 
  • South Aegean
    • Andros
Reinecke, T. (1982): Contributions to Mineralogy and Petrology 79, 333-336.; Reinecke, T. (1986): Crystal chemistry and reaction relations of piemontites and thulites from highly oxidized low grade metamorphic rocks at Vitali, Andros Island, Greece. Contributions to Mineralogy and Petrology 93, 56-76.
Italy (FRL)
 
  • Aosta Valley
    • Saint-Marcel
August Breithaupt (1838) Journal Prackt. Chemie, 15:329
USA
 
  • California
    • Lake Co.
      • Hidden Valley Lake
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 308.
  • New York
    • St. Lawrence Co.
James Cheshire
A.Mathauser collection
Mineral and/or Locality  
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