File:Sunstone (Tertiary; Spectrum Mine, Oregon, USA) 11.jpg
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| Description |
English: Faceted sunstone from the Tertiary of Oregon, USA. (~1.0 centimeters across at its widest; 2.2 carats)
The gemstone known as "sunstone" is transparent to translucent plagioclase feldspar with mineral inclusions that impart attractive colors. Oregon sunstone is particularly famous because the inclusions are tiny masses of native copper (Cu). In the Oregon sunstone collecting fields, sunstones are relatively large plagioclase phenocrysts in Tertiary-aged, porphyritic, mafic volcanic rocks. Not all Oregon sunstones come from the same volcanic unit. Published dates indicate that the host rocks are Miocene in age - about 15 to 17 million years old. Locality: Spectrum Mine, east of the northern end of Lake Abert & north of the town of Plush, southern Oregon, USA (vicinity of 42 43' 55.43" North latitude, 119 52' 08.54" West longitude) Some info. from: www.gia.edu/doc/1495295555154/GG-FA13-Pay-oregon-sunstone... See info. at: www.highdesertgemsandminerals.com/html/spectrum_sunstone_... |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51660954448/ |
| 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@N05/51660954448. It was reviewed on 27 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 23:10, 27 December 2021 | | 1,625 × 891 (904 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51660954448/ with UploadWizard |
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