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Orbicular Jasper

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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.

Visit for gemological information about Orbicular Jasper.

Classification of Orbicular Jasper

Other Names for Orbicular Jasper

Name in Other Languages:

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 Orbicular Jasper URL:
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Localities for Orbicular Jasper

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.
  • Mahajanga Province (Majunga)
    • Sofia Region
      • Analalava District
        • Ambolobozo
Lieber, W. (2003): Sphärolithischer Chalcedon von Madagaskar. LAPIS 28 (9), 18-22
  • 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).
  • Western-Siberian Region
Andrey S. Gorshkov specimen from Korgon river
  • 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;
  • South Dakota
    • Jackson Co.
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
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