Common Opal
A variety of Opal
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About Common Opal
Formula:
SiO2 · nH2O
A type of opal that doesn't show any fire.
Visit gemdat.org for gemological information about Common Opal.
Visit gemdat.org for gemological information about Common Opal.Unique Identifiers
Mindat ID:
5981 (as Common Opal)
3004 (as Opal)
3004 (as Opal)
Long-form identifier:
mindat:1:1:5981:3 (as Common Opal)
mindat:1:1:3004:1 (as Opal)
mindat:1:1:3004:1 (as Opal)
Pronunciation of Common Opal
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Chemistry of Common Opal
Mindat Formula:
SiO2 · nH2O
Elements listed:
Common Associates
Associations Based on Photo Data:
| 8 photos of Common Opal associated with 'Opal-AN' | SiO2 · nH2O |
| 3 photos of Common Opal associated with 'Chalcedony' | SiO2 |
| 3 photos of Common Opal associated with Serpentine Subgroup | D3[Si2O5](OH)4 |
| 3 photos of Common Opal associated with Quartz | SiO2 |
| 2 photos of Common Opal associated with Opal | SiO2 · nH2O |
| 2 photos of Common Opal associated with Siderite | FeCO3 |
| 2 photos of Common Opal associated with 'Carnelian' | SiO2 |
| 2 photos of Common Opal associated with 'Hyalite' | SiO2 · nH2O |
| 2 photos of Common Opal associated with Hydromagnesite | Mg5(CO3)4(OH)2 · 4H2O |
| 2 photos of Common Opal associated with 'Fire Opal' | SiO2 · nH2O |
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 Common Opal
mindat.org URL:
https://www.mindat.org/min-5981.html
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References for Common Opal
Reference List:
Jones, J. B., Segnit, E. R. (1971) The nature of opal I. nomenclature and constituent phases. Journal of the Geological Society of Australia, 18 (1) 57-68 doi:10.1080/00167617108728743
Localities for Common Opal
Showing 42 localities.
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 | |
| Brown (1908) |
| Locality description |
| Fetherston et al. (2013) |
| Jacobson. (2007) |
| Fetherston et al. (2013) |
| Fetherston et al. (2013) |
| Fetherston et al. (2013) |
| Fetherston et al. (2013) | |
| Feldtmann (1919) |
| Kim McDonald collection | |
| Fetherston et al. (2013) | |
| Fetherston et al. (2013) | |
| Fetherston et al. (2013) |
| mrdate.usgs.gov (n.d.) |
| Fetherston et al. (2013) |
| Grguric et al. (2006) |
| Fetherston et al. (2013) | |
| Fetherston et al. (2013) |
| Fetherston et al. (2013) |
| Fetherston et al. (2013) |
| Simpson (1948) |
Canada | |
| Wojdak |
Italy | |
| Bonifazi (2020) |
Mexico | |
| Cook (2013) |
New Zealand | |
| Rod Martin Collection |
| Collection of RJ Martin |
| Rod Martin Collection |
| Moore (1979) |
| Collection of RJ Martin | |
| Collection of RJ Martin |
Serbia | |
| Miladinović et al. (2016) |
| Miladinović et al. (2016) |
| Miladinović et al. (2016) |
UK | |
| Alysson Rowan collection |
USA | |
| Matthew Stanley Collection |
| Jat Thompson Collection |
| Locality description |
| Steve Ewens Collection |
| T Douglas Schonewald Collection |
| Personally collected by T Douglas ... | |
| T Douglas Schonewald Collection |
| T Douglas Schonewald Collection |
Hahei, Whitianga, Coromandel peninsula, Thames-Coromandel District, Waikato Region, New Zealand