File:Opalite (Utah, USA) 9.jpg
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| Description |
English: Opalite from Utah, USA.
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 Utah opalite shown here is probably a sample from a paleo-hot spring deposit. This material has been nicknamed "bacon opal" or "candy opal" or "candy stripe opal". The color banding is the result of differing amounts of impurities in individual opalite layers. The coloring agents may be iron oxides. I've encountered two general locality attributions for Utah "candy stripe opal" - the Thomas Range and the Mineral Mountains. I don't know if either (or both) is accurate. Locality: unrecorded/undisclosed site in Utah, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50722584411/ |
| 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@N05/50722584411. It was reviewed on 15 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:41, 15 December 2020 | | 1,721 × 1,242 (1.26 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50722584411/ with UploadWizard |
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