| P number: | P521536 |
|---|---|
| Caption: | Mineral specimen of chrysocolla. Leadhills, Lanarkshire. |
| Description: | The specimen contains the distinctive blue-green copper mineral chrysocolla, within a complex mineral vein containing other metal-bearing minerals. British Geological Survey Petrology Collection sample number MJ 30347. It normally occurs as very fine fibrous crusts or as earthy masses, sometimes globular. Chrysocolla occurs in the area of oxidation (alteration) around copper deposits in association with the minerals malachite and azurite, where it forms by the reaction of siliceous waters with copper ores. It has long been used to detect the presence of copper deposits. This sample was collected from Leadhills in 1872. Chrysocolla is a secondary mineral of copper. It is a hydrous copper silicate and is usually found as an incrustation or staining in conjunction with decomposing chalcopyrite. This specimen was found at Leadhills, a formerly important lead-mining area. Almost all of the veins in the area contain galena however some carry copper in excess of other sulphides and have been worked for that metal. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Unknown |
| Copyright statement: | NERC |
| Orientation: | Landscape |
| Size: | 222.25 KB; 999 x 774 pixels; 85 x 66 mm (print at 300 DPI); 264 x 205 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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