Opaline
A variety of Opal
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About Opaline
Formula:
SiO2 · nH2O
Pseudomorphs of Opal after Serpentine. A local term.
Originally described from Quicksilver region, Napa Co., California, USA.
Originally described from Quicksilver region, Napa Co., California, USA.
Unique Identifiers
Mindat ID:
3007 (as Opaline)
3004 (as Opal)
3004 (as Opal)
Long-form identifier:
mindat:1:1:3007:2 (as Opaline)
mindat:1:1:3004:1 (as Opal)
mindat:1:1:3004:1 (as Opal)
Chemistry of Opaline
Mindat Formula:
SiO2 · nH2O
Elements listed:
Common Associates
Associated Minerals Based on Photo Data:
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 Opaline
mindat.org URL:
https://www.mindat.org/min-3007.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
References for Opaline
Reference List:
Localities for Opaline
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.
Arctic Ocean | |
| Bogdanov et al. (1995) | |
Australia | |
| Mulholland (1984) |
| Gilligan et al. (1995) |
| Nethery et al. (1998) |
| Brugger et al. (2005) |
| De Broekert (2003) |
| Kalgoorlie Miner newspaper (1920) |
| Marston (1979) |
| www.fairstarresources.com (n.d.) |
| Llorca (1998) |
| The Inquirer and Commercial News newspaper (Perth) |
| The Inquirer and Commercial News newspaper (Perth) |
| Clarke et al. (1986) |
| Clarke et al. (1986) | |
| The Southern Cross Times newspaper (1913) |
Brazil | |
| Costa et al. (2016) |
Canada | |
| minfile.gov.bc.ca (n.d.) |
| Grema et al. (2024) |
Chile | |
| Lohmeier et al. (2025) |
| Lohmeier et al. (2022) | |
| Lohmeier et al. (2022) | |
| Chouinard et al. (2005) |
| TOM HENRICKSEN et al. (2002) |
Ecuador | |
| an NI 43-101 Technical Report prepared ... +1 other reference |
Greece | |
| Voudouris et al. (2007) |
Kenya | |
| Owen et al. (2008) |
Mexico | |
| Canet et al. (2005) |
| Sotelo (2016) |
New Zealand | |
| Nestmeyer et al. (2021) |
| Hampton et al. (2004) |
| Zuquim et al. (2012) |
| Moore (1979) |
Pacific Ocean | |
| Friesen et al. (1995) |
| Friesen et al. (1995) | |
Papua New Guinea | |
| Semple et al. (1998) |
| Chapple et al. (1998) |
Turkey | |
| Yigit (2012) |
| Yigit (2012) |
| Aluç et al. (2025) |
| Yigit (2012) |
| Akinci (2009) |
Ukraine | |
| Popov (2023) |
USA | |
| Clark (1993) |
| Gissler et al. (2024) |
| Castor +1 other reference |
| PEDRAZA ROJAS et al. (2016) |
Erongo Mountains, Erongo Region, Namibia