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4 cm marcasite aggregate from the Anna quarry, Lethmate, Sauerland, Westphalia. This quarry is regionally known for a small copper ore vein that gave nice malachite sprays a couple of years ago. (Author: Andreas Gerstenberg)
| Dimensiones: | 600 x 450 |
| Tamaño fichero: | 26.91 kbytes |
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