Plasma
A variety of 'Chalcedony' [Quartz]
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About Plasma
Formula:
SiO2
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)
and
"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 ochre 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.
Various descriptions of plasma include
"of a dullish green color with yellow and whitish dots and a glistening lustre" (J.D. Dana, 1837)
and
"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 ochre 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.Unique Identifiers
Mindat ID:
39469 (as Plasma)
3337 (as Quartz)
3337 (as Quartz)
Long-form identifier:
mindat:1:1:39469:5 (as Plasma)
mindat:1:1:3337:0 (as Quartz)
mindat:1:1:3337:0 (as Quartz)
Pronunciation of Plasma
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Chemistry of Plasma
Mindat Formula:
SiO2
Elements listed:
Common Associates
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 Plasma
mindat.org URL:
https://www.mindat.org/min-39469.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Plasma
Reference List:
Platonov, Alexej N., Szuszkiewicz, Adam (2015) Green to blue-green quartz from Rakowice Wielkie (Sudetes, south-western Poland) – a re-examination of prasiolite-related colour varieties of quartz. Mineralogia, 46 (1). 19-28 doi:10.1515/mipo-2016-0004
Koníčková, Šárka, Losos, Zdeněk, Houzar, Stanislav, Všianský, Dalibor (2021) Specific green zonal silica nodules of serpentinite weathering: unusual products of silicification in laterite-like residuum (Moldanubian Zone, Bohemian Massif). Geologica Carpathica, 72 (1). 68-71 doi:10.31577/geolcarp.72.1.5
Localities for Plasma
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Grguric et al. (2006) |
| Fetherston et al. (2013) | |
Austria | |
| Strasser (1993) |
Brazil | |
| Santos et al. (2025) |
Bulgaria | |
| J.Ralph and P.Martynov site visit 2023 |
China | |
| Rucheng Wang et al. (2018) |
Czech Republic | |
| Koníčková et al. (2021) | |
India | |
UK | |
| Render (n.d.) |
Madagascar