| Locality type: | Mine |
| Classification |
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| Species: | Quartz |
| Formula: | SiO2 |
| Habit: | Pyramidle crystals |
| Colour: | White-colourless, brown |
| Abundance at site: | Very common |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Associated Minerals Based on Photo Data: |
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| Millerite | 11 |
| Albite | 8 |
| Goethite | 5 |
| Rutile | 5 |
| Pyromorphite | 4 |
| Chalcopyrite | 4 |
| Apatite | 3 |
| Sphalerite | 2 |
| Marcasite | 1 |
| Hemimorphite | 1 |
| Chlorite Group | 1 |
| Data |
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| Mineral Data: | Click here to view Quartz data |
| Locality Data: | Click here to view Bryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK |
| Photo Gallery | View Gallery (6 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 18447 |
| Long-form Identifier: | 1:3:18447:2 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Quartz |
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| 0.9km (0.5 miles) | ⓘCamdwrmawr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK |
| 0.9km (0.6 miles) | ⓘHenfwlch Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 1.6km (1.0 miles) | ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 1.7km (1.1 miles) | ⓘHafan Mine (Canninog Mine; Bwlch Canninog Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 1.8km (1.1 miles) | ⓘDrosgol Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK |
| 2.1km (1.3 miles) | ⓘBwlch Ystyllen Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK |
| 3.6km (2.2 miles) | ⓘBwlch Glas Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 3.7km (2.3 miles) | ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 4.1km (2.5 miles) | ⓘBlaenceulan Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 4.5km (2.8 miles) | ⓘLlawr-y-cwm-bach Mine, Bontgoch, Trefeirig, Ceredigion, Wales, UK |
| References |
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Bryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK