Ferberite, Marcasite, Quartz
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Ferberite sitting between marcasite-balls on quartz, 8.5 cm, from the Tazna mine, Bolivia. Ex Kosnar collection; Robert Brandstetter photo.
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Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| — | Kosnar | Not disclosed |
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Mineral guide
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iron-rich wolframite with stout blade-like prisms and deep black luster; forms in hydrothermal tin-tungsten deposits; prized on quartz or fluorite.Regional guide
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