Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Onyx

This page is currently not sponsored. Click here to sponsor this page.
Formula:
SiO2
System:
Trigonal
Colour:
Black and white
Lustre:
Waxy
Hardness:
6½ - 7
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.

Classification of Onyx

mindat.org URL:
http://www.mindat.org/min-2999.html
Please feel free to link to this page.

Physical Properties of Onyx

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

Crystallography of Onyx

Crystal System:
Trigonal

Chemical Properties of Onyx

Formula:
SiO2
Essential elements:
All elements listed in formula:

Other Names for Onyx

Name in Other Languages:
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 (Cyrillic Script):Оникс
Simplified Chinese:缟玛瑙
黑玛瑙
Spanish:Ónix
Swedish:Onyx

Other Information

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 Onyx

Localities for Onyx

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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.
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., Stocklmayer, S., Stocklmayer, V. (2013): Gemstones of WA, Geological Survey of WA
    • 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
      • Kemano
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 Province
    • 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 Autonomous Region
    • 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
 
  • Bohemia (Böhmen; Boehmen)
    • Liberec Region
      • Jizerské Mtn (Iser Mtn)
geological prospecting, 2008 - 2009, Czech geological Organization
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Baden-Baden
        • Iberg
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Leisberg
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Brandenburg
    • Großräschen
      • Saalhausen
A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
    • Lübbenau
      • Calau
        • Plieskendorf
A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
India
 
  • Gujarat
    • Zaghadia (Jhagadia)
Richard M. Pearl: "Minerals of India", Mineral Digest, vol. 2.
  • Madhya Pradesh
    • Jabalpur Division
Richard M. Pearl: "Minerals of India", Mineral Digest, vol. 2.
Madagascar
 
  • Fianarantsoa Province
    • Atsimo-Atsinanana Region
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Russia
 
  • Northern Region
    • Karelia Republic
      • Ladoga Region
        • Pitkyaranta District (Pitkäranta District)
          • Salmi
Polekhovsky, Y.S., and Punin, Y.O. (2008): Geology of Ore Deposits 50(7), 642-646.
UK
 
  • Scotland
    • Tayside
      • Montrose
        • Usan
USA
 
  • Colorado
    • Grand Co.
Minerals of Colorado (1997) E.B. Eckels
    • Larimer Co.
      • Rocky Mountain National Park
Minerals of Colorado (1997) E.B. Eckels
    • Saguache Co.
Minerals of Colorado (1997) E.B. Eckels
  • 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 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 Mts
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
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: September 3, 2015 00:54:19 Page generated: August 30, 2015 06:32:53