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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 URL:
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Other Names for Orbicular Jasper

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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

Localities for Orbicular Jasper

(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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