File:Scheelite fluorescing (Timmins, Ontario, Canada) 2.jpg
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| Description |
English: Scheelite from Ontario, Canada - fluorescing under ultraviolet light.
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 about 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. Scheelite is a calcium tungstate mineral (CaWO4). It has a nonmetallic luster, is variably colored, moderately hard (H = 4.5 to 5), has one cleavage plane, is fairly heavy for its size, and fluoresces an intense blue under ultraviolet light. Scheelite occurs in igneous & metamorphic rocks, and is a ore mineral for tungsten (W). Locality: unrecorded site at or near Timmins, eastern Ontario, southeastern Canada Photo gallery of scheelite: www.mindat.org/gallery.php?min=3560 |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/31293505424/ |
| 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@N05/31293505424. It was reviewed on 23 February 2023 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 | 17:37, 23 February 2023 | | 3,008 × 2,000 (2.23 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/31293505424/ with UploadWizard |
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