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Orbicular Jasper

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Madagascar

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A variety of Chalcedony

Orbicular Jasper is a name given to a highly silicified rhyolite or tuff that has quartz and feldspar crystallized into radial aggregates of needle-like crystals forming orbicular (spherical) structures.

It is often used as a decorative stone.

Classification of Orbicular Jasper

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Other Names for Orbicular Jasper

Synonyms:
Ocean AgateOcean JasperOrbicular AgatePoppy Jasper
Other Languages:
German:Augenjaspis
Ozeanachat

Other Information

Health Warning: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 Orbicular Jasper

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    • Localities for Orbicular Jasper

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    (TL) indicates type locality. ? 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.
    Madagascar
     
    • Mahajanga (Majunga) Province
      • Sofia Region
        • Analalava District
          • Ambolobozo
    		Lieber, W. (2003): Sphärolithischer Chalcedon von Madagaskar. LAPIS 28 (9), 18-22
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Kizil'skii district
    		Leonova L.V., Pribavkin S.V., Gulyaeva T.Ya. (2003) Concretions from Paleozoic silicites of Southern Ural, - Mineralogicheskoe Obscchestvo, Vestnik Ural'skogo Otdeleniya, №2, pp. 61-65 (in Russian).
    USA
     
    • Arizona
      • Cochise Co.
        • Benson
    		Van King
    • California
      • Santa Clara Co.
        • Santa Cruz Mts
          • Paradise Valley
    		Melhase, John (1934), A diversity of many fine minerals available in California for collectors: Oregon Mineralogist: 2(7): 7; Mineralogist, The (1935): 3(3): 34; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 318; www.cst.cmich.edu/users/dietr1rv/jasper.htm
    • South Dakota
      • Jackson Co.
    		SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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