File:Opalite with cinnabar (B and B Mine, western Esmeralda County, southwestern Nevada, USA).jpg
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Summary
[edit]DescriptionOpalite with cinnabar (B and B Mine, western Esmeralda County, southwestern Nevada, USA).jpg |
English: Opalite with cinnabar from Nevada, USA. (field of view ~3.2 cm across)
Opalite is an opal-dominated rock (opal = amorphous hydrous silica = SiO2·nH2O). “Opal” is a mineral/mineraloid name. “Opalite” is a rock name. Opalites form principally by alteration of volcanic rock or alteration of siliceous sinter (a type of hot spring deposit). They are often described as “impure” opal rocks. They lack the famous “fire” & rainbow colors of gem-grade opal. The opalite shown above is from Nevada's mercury belt and contains disseminated reddish-colored cinnabar (HgS - mercury sulfide). The opalite represents a paleo-hot spring deposit. Locality: B and B Mine, western Esmeralda County, southwestern Nevada, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/15141195252/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15141195252. It was reviewed on 15 November 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
15 November 2020
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current | 11:48, 15 November 2020 | 1,251 × 588 (62 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/15141195252/ with UploadWizard |
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