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Onyx

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About OnyxHide

Formula:
SiO2
Colour:
Black and white
Lustre:
Waxy
Hardness:
6½ - 7
Specific Gravity:
2.6 - 2.65
Crystal System:
Trigonal
A variety of Agate

In correct usage, the name refers to a black and white banded variety of Agate, or sometimes a monochromatic agate with dark and light bands (brown and white for example) - but traditionally the name was reserved for black and white banded agate, and brown varieties named Sardonyx.

In recent times the name has become confused with other banded materials, in particular banded calcite formed in cave systems such as the material found in Mexico and Pakistan and often carved, in fact the majority of carved material (such as book-ends, chess-sets, etc) that are available today are made from this carbonate rock. This is a carbonate material and is not true Onyx. Other names have been used over time for this material, such as "Mexican Onyx" and "onyx-marble". Careless use of these names has resulted in the term 'Onyx' being incorrectly applied to a variety of banded materials that are not covered by the original definition of the name.

Visit gemdat.org for gemological information about Onyx.


Physical Properties of OnyxHide

Transparency:
Translucent, Opaque
Comment:
Vitreous when polished
Colour:
Black and white
Comment:
often produced by dying agates
Streak:
white
Hardness:
6½ - 7 on Mohs scale
Fracture:
Conchoidal
Density:
2.6 - 2.65 g/cm3 (Measured)    
Comment:
varies with amount and type of impurities

Chemical Properties of OnyxHide

Formula:
SiO2

Crystallography of OnyxHide

Crystal System:
Trigonal

Synonyms of OnyxHide

Other Language Names for OnyxHide

Bulgarian:Оникс
Czech:Onyx
Dutch:Onyx
Finnish:Onyksi
French:Onyx
Galician:Ónix
German:Onyx
Italian:Onice
Latin:Onyx
Latvian:Onikss
Lithuanian:Oniksas
Polish:Onyks
Portuguese:Ónix
Romanian:Onix
Russian:Оникс
Serbian:Оникс
Simplified Chinese:缟玛瑙
黑玛瑙
Spanish:Ónix
Swedish:Onyx

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Onyx associated with QuartzSiO2
2 photos of Onyx associated with Carnelian

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.

Internet Links for OnyxHide

Localities for OnyxHide

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.
Afghanistan
 
  • Helmand
    • Dushan District
Vikhter, B. Y., Yeremenko, G. K., & Chmyrev, V. M. (1976). A young volcanogenic carbonatite complex in Afghanistan. International Geology Review, 18(11), 1305-1312. Woolley A.R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe, p. 29
Argentina
 
  • Catamarca Province
Tauber, Sebastian (2015) unpublished data on site visit.
Raúl J. Tauber Larry´s collection (2014); Hugo A. Peña (1970): Minerales y rocas de aplicación de la Provincia de Tucumán. Secretaría de Estado de Comercio, Industria y Minería. Dirección Provincial de Minas. Tucumán. República Argentina.
Raúl J. Tauber Larry´s collection (2014)
Hugo A. Peña (1970): Minerales y rocas de aplicación de la Provincia de Tucumán. Secretaría de Estado de Comercio, Industria y Minería. Dirección Provincial de Minas. Tucumán. República Argentina.
Australia
 
  • Western Australia
    • East Pilbara Shire
      • Marble Bar
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia. Geological Survey of Western Australia, Mineral Resources Bulletin 25, 306 pages.
    • Meekatharra Shire
      • Bulloo Downs Station
Gemstones of Western Australia; Dept of Minerals and Energy; Western Australian State Government; Perth, 1994; http://www.kumarina.com/projects-Ilgarari.php; The West Australian newspaper, The Mining Industry. Northern Fields. Inspectors Report, 15/02/1929;
    • Ngaanyatjarraku Shire
      • Warburton
Fetherston, J., Stocklmayer, S., Stocklmayer, V. (2013): Gemstones of WA, Geological Survey of WA
Brazil
 
  • Pará
    • São Geraldo do Araguaia
Revista Brasileira de Geociências, vol.30
  • Rio Grande do Sul
Strieder, A. J., & Heemann, R. (2006). Structural constraints on Paraná basalt volcanism and their implications on agate geode mineralization (Salto do Jacuí, RS, Brazil). Pesquisas em Geociências. Porto Alegre, RS. Vol. 33, n. 1 (2006), p. 37-50.
Canada
 
  • British Columbia
    • Omenica Mining Division
Simandl, G. J., Paradis, S., Diakow, L. J., Wojdak, P. J., & Hartley, A. J. (1998). PRECIOUS OPAL IN THE WHITESAIL RANGE, WEST-CENTRAL BRITISH COLUMBIA, CANADA (NTS 93E/10W AND 93E/11E). Geological Fieldwork: A Summary of Field Activities and Current Research..., 285.
China
 
  • Sichuan
    • Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture)
      • Kangding Co.
        • Daduhe gold field
Zhimin Cao (1991): Journal of Chengdu College of Technology 18(4), 26-36
  • Xinjiang
    • Hami Prefecture (Kumul Prefecture; Qumul Prefecture)
      • Yiwu Co. (Aratürük Co.)
        • Naomaohu
Yanling Tang (2005): Non-metallic deposits of Xinjiang, China [Zhongguo Xinjiang Fei Jinshu Kuangchuang]. Geological Publishing House (Beijing), 289 pp.
Czech Republic
 
  • Liberec Region
    • Jizerské Mtn (Iser Mtn)
geological prospecting, 2008 - 2009, Czech geological Organization
France
 
  • Auvergne-Rhône-Alpes
    • Allier
      • Moulins
OLLIC Pascal Collection
Germany
 
  • Baden-Württemberg
    • Karlsruhe Region
      • Baden-Baden
        • Iberg (Yberg)
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Leisberg
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Brandenburg
    • Oberspreewald-Lausitz
      • Großräschen
        • Saalhausen
A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
      • Lübbenau
        • Calau
          • Plieskendorf
A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
India
 
  • Gujarat
    • Vadodara District
      • Zaghadia (Jhagadia)
Richard M. Pearl: "Minerals of India", Mineral Digest, vol. 2.
  • Madhya Pradesh
Richard M. Pearl: "Minerals of India", Mineral Digest, vol. 2.
Madagascar
 
  • Atsimo-Atsinanana
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Russia
 
  • Republic of Karelia
    • Ladoga Region
      • Pitkyaranta mining district (Pitkäranta mining district)
        • Salmi
Polekhovsky, Y.S., and Punin, Y.O. (2008): Geology of Ore Deposits 50(7), 642-646.
UK
 
  • Scotland
    • Angus
      • Montrose
        • Usan
USA
 
  • Colorado
    • Grand Co.
Minerals of Colorado (1997) E.B. Eckel
    • Larimer Co.
      • Rocky Mountain National Park
Minerals of Colorado (1997) E.B. Eckel
    • Saguache Co.
Minerals of Colorado (1997) E.B. Eckel
  • Idaho
    • Power Co.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • Montana
Jay Ellis Ransom,1974, Gems and Minerals of America
    • Madison Co.
      • Ruby Range
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • Oregon
    • Lane Co.
      • Lookout Point prospects
Ariel S Wall
  • Rhode Island
    • Providence Co.
      • Cumberland
AmMIn 11:334-340
  • South Dakota
    • Custer Co.
      • Custer Mining District
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
  • Utah
    • Garfield Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Salt Lake Co.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • Tooele Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Stansbury Mountains
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Utah Co.
      • Pelican Point Area
UGMS Bull 117 Minerals and Mineral Localities of Utah
UGMS Bull 117 Minerals and Mineral Localities of Utah
UGMS Bull 117 Minerals and Mineral Localities of Utah
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • Virginia
Minerals of Virginia 1990 by R. V. Dietrich
Minerals of Virginia 1990 by R. V. Dietrich
  • Wyoming
    • Platte Co.
Rocks & Minerals 76:389
 
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