File:Malachite (Katanga Province, Zaire) 2 (27278564454).jpg
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Summary
| Description |
Fibrous malachite from Zaire. (~6.4 centimeters across at its widest) 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 is a green copper hydroxy-carbonate mineral, Cu2CO3(OH)2. The green coloration is from Cu+2. Malachite usually occurs with azurite, an intensely blue-colored copper hydroxy-carbonate. These two minerals 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. Locality: Katanga Province, southern Zaire (“D.R. Congo”) 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 | Malachite (Katanga Province, Zaire) 2 |
| 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@N05/27278564454 (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. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:22, 6 December 2019 | | 3,089 × 2,468 (5.57 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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