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About PlasmaHide

A variety of Chalcedony

A microgranular or microfibrous form of chalcedony coloured in various shades of green by disseminated silicate particles (variously attributed to celadonite, chlorite, amphibole, etc.).

Various descriptions of Plasma include
of a dullish green color with yellow and whitish dots and a glistening lustre
J.D. Dana (1837)
Its most common colour is a variety intermediate between grass green and leek green and sometimes approaching to pale mountain green It frequently occurs greenish white and oehre yellow the latter colour is in dots the first in spots or clouded Internally its lustre is glistening inclining to glimmering.
R. Jameson (1816)

Compare with Prase, which has a very much more defined colour ("leek green") and is generally more translucent.

Visit gemdat.org for gemological information about Plasma.

Chemical Properties of PlasmaHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Jasper1 photo of Plasma associated with Jasper on mindat.org.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for PlasmaHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
J.D. Dana (1837) Syst. Min., 1st ed., p.341
R. Jameson (1816) A syst. of min., p.213

Internet Links for PlasmaHide

Localities for PlasmaHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Western Australia
    • Menzies Shire
Grguric, B.A., Pring, A., Bevan, A.W.R., Downes, P.J. (2006): The Minerals of Comet Vale Western Australia, Australian Journal of Mineralogy (2006):12: 9-23
Fetherston, J. M., Stocklmayer, S. M. and Stocklmayer, V. C. (2013): Gemstones of Western Australia. Mineral Resources Bulletin 25, Geological Survey of Western Australia, Perth, Australia, 133 pp.
John Coggin Brown (1955) Mineral Wealth: Part III. Materials used in building construction, civil engineering, etc.
  • Sagarmatha Zone
    • Mt Everest (Qomolangma)
Rucheng Wang, Fuyuan Wu, Lei Xie, Xiaochi Liu, Cheng Liu (2018) Pegmatites on the Mount Qomolangma, Tibet. in abstracts of the 22nd IMA Meeting Melbourne p 290
  • Nasarawa
Okunlola, O. A., & Ocan, O. O. (2009). Rare metal (Ta-Sn-Li-Be) distribution in Precambrian pegmatites of Keffi area, Central Nigeria. Nature and Science, 7, 90-99.
  • England
    • Shropshire
      • Hope-Shelve District
        • Stiperstones
Paul Render
Mineral and/or Locality  
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