from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Resembling jasper.
  • n. A rare dense siliceous rock similar in appearance to chert.

from The Century Dictionary and Cyclopedia

  • Same as jaspoid.


Sorry, no etymologies found.


  • The gangue is mainly fine-grained quartz or jasperoid, and barite.

    The Economic Aspect of Geology

  • It is highly encouraging to observe Carlin-style precious metal mineralized jasperoid/silica breccia in outcrop more than a kilometer away to the southeast.


  • During recent exploration in the Milagro Project area, an elongate outcrop of jasperoid/silica breccia was sampled and returned precious metal values ranging from 0.39 to


  • Bravo reports the presence of "auriferous lower plate carbonate rocks and jasperoid" locally on the eastern and southern portions of their Pete Hanson Project with

    Marketwire - Breaking News Releases

  • The breccia of the San Pedro mine is composed of clasts including jasperoid silica, altered calcareous siltstone, skarn, several igneous rock types, limestone, and breccia. News Articles

  • Of particular importance, geologic mapping has found that these same distal features (including a zone of breccia/brecciated limestone in-filled with abundant coarse-bladed barite, jasperoid mantos layers, jasperoid (+/- barite) veins/veinlets with anomalous copper and pathfinder metal content) can be traced in outcrop in continuous fashion for 1,200 meters semi-circular distance around the entire east and north sides of Cerro Cinchado (the down-faulted block).

    The Earth Times Online Newspaper

  • In the 300,000 sq. meter area of jasperoid at the Cerro La Mina prospect, 189 well spaced jasperoid samples (approx. 50 meter centers) contain an average of 50 g/t Ag.with 10% of the samples containing over 200 g/t Ag. For 1.2 kilometers along the western contact of the jasperoid with the overlying volcanics, the jasperoid (86 samples) contains an average of 90 g/t Ag.of which 10% of the samples grade at an average of

    The Earth Times Online Newspaper

  • The combination of IP and Resistivity has clearly identified the structures that control the distribution of the jasperoid.

    The Earth Times Online Newspaper

  • The gold mineralization identified so far on the Maravillas Property is related to jasperoid occurrences controlled by a regional system of thrust faults with nearby and likely related silver and copper mineralization.

    Marketwire - Breaking News Releases

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    Out in the Field

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