File:Scheelite (Timmins, Ontario, Canada) 1.jpg

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Description
English: Scheelite from Ontario, Canada. (field of view: 3.4 cm across)

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@N05/32015962671/
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/32015962671. 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.

23 February 2023

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Date/TimeThumbnailDimensionsUserComment
current17:37, 23 February 2023Thumbnail for version as of 17:37, 23 February 2023866 × 815 (207 KB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/32015962671/ with UploadWizard

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