File:Turquoise (Royston Mining District, northwest of Tonopah, Nevada, USA) - 50968157587.jpg
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Summary[edit]
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| Description |
English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5600 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The phosphate minerals all contain one or more phosphate anions (PO4 -3). Turquoise is a hydrous copper aluminum hydroxy-phosphate mineral, CuAl6(PO4)4(OH)8·4H2O. It is a secondary mineral that forms near the surface, usually near copper deposits. The color ranges from bluish to bluish-green to greenish and the hardness is 5 to 6 on the Mohs Scale. Crystals are rare - turquoise usually forms very fine-grained masses. The turquoise seen here is from Nevada's Royston Mining District. The matrix for turquoise in the area has apparently been referred to as altered/silicified quartz monzonite. Locality: unrecorded/undisclosed mine in the Royston Mining District, northwest of Tonopah, Nevada, USA Photo gallery of turquoise: www.mindat.org/gallery.php?min= 4060 |
| Date | |
| Source | https://www.flickr.com/photos/jsjgeology/50968157587/ |
| Author | James St. John |
Licensing[edit]
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- to remix – to adapt the work
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50968157587. It was reviewed on 22 February 2021 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 | 17:11, 22 February 2021 | | 3,994 × 2,658 (8.59 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/jsjgeology/50968157587/ with UploadWizard |
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