| Locality type: | Open-Cast Mine |
| Classification |
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| Species: | Siegenite |
| Formula: | CoNi2S4 |
| Comments: | Xls to 0.5mm |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Ankerite | 3 |
| Chalcopyrite | 1 |
| Data |
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| Mineral Data: | Click here to view Siegenite data |
| Locality Data: | Click here to view Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK |
| Photo Gallery | View Gallery (3 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 39211 |
| Long-form Identifier: | 1:3:39211:4 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Siegenite |
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| 19.2km (12.0 miles) | ⓘInternational Colliery, Blaengarw, Bridgend, Wales, UK |
| 19.4km (12.0 miles) | ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK |
| 21.6km (13.4 miles) | ⓘWestern Colliery, Nant-y-moel, Bridgend, Wales, UK |
| 22.5km (14.0 miles) | ⓘRhondda Valley, Rhondda Cynon Taf, Wales, UK |
| 22.9km (14.2 miles) | ⓘGelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK |
| 24.1km (14.9 miles) | ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK |
| 27.5km (17.1 miles) | ⓘPark Slip West (Margam Opencast), Cefn Cribwr, Bridgend, Wales, UK |
| 30.5km (19.0 miles) | ⓘDeep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK |
| 31.5km (19.6 miles) | ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK |
| 33.6km (20.9 miles) | ⓘLlanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK |
| References |
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Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK