File:Azurite-malachite on gossan (Morenci Mine, Arizona, USA) (27890565095).jpg
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Summary
DescriptionAzurite-malachite on gossan (Morenci Mine, Arizona, USA) (27890565095).jpg |
Azurite and malachite on iron oxide gossan from Arizona, USA. (~5.0 centimeters across at its widest) Blue = azurite Green = malachite Reddish-brown = gossan matrix 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 5400 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 carbonate minerals all contain one or more carbonate (CO3-2) anions. Malachite and azurite are attractive, richly colored copper hydroxy-carbonate minerals. Malachite has a nice green color - its formula is Cu2CO3(OH)2. Azurite has a dark, rich blue color - its formula, Cu3(CO3)2(OH)2, is very close to malachite. The blue color of azurite is from Cu+, while the green color of malachite is from Cu+2. Azurite & malachite almost invariably occur together, and are telling indicators of copper in the field, even in very small quantities. Blue azurite tends to crystallize first, and can convert to green malachite. Some azurite-malachite specimens are solid enough to be cut and polished as semi-precious stone. Locality: Morenci Mine, western Greenlee County, southeastern Arizona, USA Photo gallery of azurite: <a href="http://www.mindat.org/gallery.php?min=447" rel="nofollow">www.mindat.org/gallery.php?min=447</a> Photo gallery of malachite: <a href="http://www.mindat.org/gallery.php?min=2550" rel="nofollow">www.mindat.org/gallery.php?min=2550</a> |
Date | |
Source | Azurite-malachite on gossan (Morenci Mine, Arizona, USA) |
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@N05/27890565095 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 December 2019
Items portrayed in this file
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some value
2 May 2016
0.01666666666666666666 second
8.295 millimetre
image/jpeg
527a53bc3f9f47079dc6e437878edcd31371d6b3
3,405,761 byte
1,971 pixel
2,585 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:22, 6 December 2019 | 2,585 × 1,971 (3.25 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Exposure time | 1/60 sec (0.016666666666667) |
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ISO speed rating | 80 |
Date and time of data generation | 14:22, 2 May 2016 |
Lens focal length | 8.295 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 01:52, 25 June 2016 |
Exif version | 2.21 |
Date and time of digitizing | 14:22, 2 May 2016 |
Meaning of each component |
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APEX aperture | 6.34375 |
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Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
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Focal plane resolution unit | inches |
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File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 19:52, 24 June 2016 |
Unique ID of original document | 6B205194AF85778D53B757628AD79E72 |