File:Sperrylite on chalcopyrite, Norilsk.jpg
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Summary
[edit]DescriptionSperrylite on chalcopyrite, Norilsk.jpg |
Sperrylite (silvery crystals at far left) & chalcopyrite (brassy gold areas + peacock-colored tarnished area at lower right) & magnetite (small black crystals at far left) (field of view 2.75 cm across). Sperrylite is a very rare platinum arsenide mineral (PtAs2). Very few localities on Earth have been reported to have sperrylite. The two classic localities for this mineral are Sudbury, Ontario, Canada and the Norilsk Mining District in northern Siberia. Sperrylite has a metallic luster, a bright silvery color, a dark gray to black streak, is fairly hard (H = 6 to 7), and is quite heavy for its size. It forms crystals in the isometric system, resulting in octahedrons and octahedrons truncated by cubic forms. |
Date | |
Source | Sperrylite on chalcopyrite (Permian-Triassic boundary time, 251 Ma; Norilsk Mining District, Krasnoyarsk, northern Siberia, Russia) |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15124019115. It was reviewed on 15 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
15 September 2014
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current | 15:02, 14 September 2014 | 2,658 × 1,662 (2.96 MB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2commons |
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Metadata
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Orientation | Normal |
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Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 22:33, 2 September 2014 |
Color space | Uncalibrated |
Image width | 2,658 px |
Image height | 1,662 px |
Date and time of digitizing | 18:30, 2 September 2014 |
Date metadata was last modified | 18:33, 2 September 2014 |