Prase
A variety of Quartz
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About Prase
Formula:
SiO2
Name:
From the Greek praso = leek.
A variety of Quartz
Originally, the varietal name "prase" was applied to a dull leek-green colored quartzite (a rock, not a mineral*); but over the years it has been also applied to other materials, particularly a green colored jasper of similar color. For perhaps more than a century it was restricted to granular micro-crystalline varieties of quartz and the original quartzite; but in recent years euhedral crystals of quartz having a similar leek-green color have had the term applied to them as well, expanding the definition beyond micro-crystalline forms. Now it is simply a color descriptor for quartz: If it is leek-green, it is called "prase" - whether it is micro- or macro-crystalline, and no matter what causes the color. Basically, the term no longer has any scientific rigor - it has become a general term; it can't even truly be called a varietal name any longer - since it covers more than one material.
* However, the original German definition of "Prasem" is that of a quartz, in crystals or massive, which is coloured leek-green by acicular inclusions of "Strahlstein" (= actinolite ) (Gürich, 1900; Klockmann, 1912).
Compare also plasma.
Originally, the varietal name "prase" was applied to a dull leek-green colored quartzite (a rock, not a mineral*); but over the years it has been also applied to other materials, particularly a green colored jasper of similar color. For perhaps more than a century it was restricted to granular micro-crystalline varieties of quartz and the original quartzite; but in recent years euhedral crystals of quartz having a similar leek-green color have had the term applied to them as well, expanding the definition beyond micro-crystalline forms. Now it is simply a color descriptor for quartz: If it is leek-green, it is called "prase" - whether it is micro- or macro-crystalline, and no matter what causes the color. Basically, the term no longer has any scientific rigor - it has become a general term; it can't even truly be called a varietal name any longer - since it covers more than one material.
* However, the original German definition of "Prasem" is that of a quartz, in crystals or massive, which is coloured leek-green by acicular inclusions of "Strahlstein" (= actinolite ) (Gürich, 1900; Klockmann, 1912).
Compare also plasma.
Visit gemdat.org for gemological information about Prase.
Unique Identifiers
Mindat ID:
6703 (as Prase)
3337 (as Quartz)
3337 (as Quartz)
Long-form identifier:
mindat:1:1:6703:0 (as Prase)
mindat:1:1:3337:0 (as Quartz)
mindat:1:1:3337:0 (as Quartz)
GUID
(UUID V4):
(UUID V4):
2e948d3c-e8b4-41a2-aa5f-28acc8d01e7d (as Prase)
4ca61d6f-75f8-4208-8fb2-3b0eecbcd8f0 (as Quartz)
4ca61d6f-75f8-4208-8fb2-3b0eecbcd8f0 (as Quartz)
Pronunciation of Prase
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Chemistry of Prase
Mindat Formula:
SiO2
Elements listed:
Synonyms of Prase
Varieties of Prase
Prase-malachite | A term for Prase enclosing Malachite. |
Common Associates
Associated Minerals Based on Photo Data:
63 photos of Prase associated with Hematite | Fe2O3 |
34 photos of Prase associated with Hedenbergite | CaFe2+Si2O6 |
27 photos of Prase associated with Amethyst | SiO2 |
22 photos of Prase associated with Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
21 photos of Prase associated with Andradite | Ca3Fe3+2(SiO4)3 |
18 photos of Prase associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
17 photos of Prase associated with Quartz | SiO2 |
13 photos of Prase associated with Calcite | CaCO3 |
13 photos of Prase associated with Byssolite | AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
11 photos of Prase associated with Iron Rose | Fe2O3 |
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 Prase
mindat.org URL:
https://www.mindat.org/min-6703.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Prase
Reference List:
Localities for Prase
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).
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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| |
| |
| Grguric et al. (2006) |
Austria | |
| Exel (1993) |
R. Hasler Collection | |
| NHM Vienna collection (collected in 2022) |
| Exel (1993) |
| Exel (1993) |
| Exel (1993) |
| Exel (1993) |
Bulgaria | |
| Marcus Voigt Collection |
China | |
| Baiwu Hao (2010) |
Yu Chen et al. (1984) +1 other reference | |
| Ottens et al. (2012) |
Ecuador | |
| Alejandro Felix Gutierrez |
France | |
| BRGM (1980) |
| Lacroix (1910) |
| Companyo (1861) |
| Baret (1905) |
| Baret (1905) |
| Baret (1905) |
Germany | |
| F. Müller: "Bayerns steinreiche Ecke" et al. (Hof) |
| Wittern (2001) |
| Wittern (2001) |
| Weiß (1990) |
| Wittern (2001) |
| Wittern (2001) |
| J. Müller |
Greece | |
| Christos Spiromitros Collection |
| Hyrsl +3 other references |
| Fritz Schreiber collection and field ... +2 other references |
Christos Spiromitros specimens | |
L. Rantos collection | |
Klemme et al. (2018) | |
Ireland | |
| Henwood (1871) |
Italy | |
| Campostrini (2001) |
| Exel (1980) +1 other reference |
| De Michele (1974) |
| no ref. in literature |
| Garavelli C.L. & Vurro F. (1984) |
Ref. Orlandi et al. (1997) | |
| L. Rossato |
De Michele (1974) | |
Kosovo | |
| Miladinovic et al. (2016) |
Morocco | |
| A.M.I. Martins collection |
Nepal | |
| António Manuel Ináçio Martins |
Poland | |
| Lis et al. (1986) |
Russia | |
| Rob Lavinsky] +2 other references |
| Ashchepkov et al. (2021) |
Spain | |
| Calvo Rebollar (2016) |
| Mata i Perelló (1990) |
| FMF Forum |
UK | |
| Collins (1871) |
| Carne (1822) +1 other reference |
USA | |
| Pelletier |
| Murdoch (1966) |
| Heinrich et al. (2004) |
| William Prescott (1852) |
| Kunz |
| American Mineralogist +1 other reference |
| |
| Gordon (1922) |
| Lapham & Geyer |
Collected April of 2012- David S. ... | |
| AmMin 11:334-340 |
Samuel Robinson (1825) | |
| Dorothy M.Schlegel (1957) |
| Ransom (1974 ) |
| Bullock (1981) |
| Dietrich (1990) |
| Dana 6: 1072. |
Mega Horio, Serifos Island, Milos, South Aegean, Greece