| Locality type: | Mine |
| Classification |
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| Species: | Mattheddleite |
| Formula: | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) |
| Comments: | Colourless xls to 0.2mm, crusts to 5mm (XRD). Associated with caledonite, and susannite. 1st welsh occurance. |
| Habit: | Prismatic |
| Colour: | Colourless |
| Abundance at site: | Very Rare |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Caledonite | 3 |
| Susannite | 3 |
| Chenite | 1 |
| Data |
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| Mineral Data: | Click here to view Mattheddleite data |
| Locality Data: | Click here to view Esgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| Photo Gallery | View Gallery (4 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 7498 |
| Long-form Identifier: | 1:3:7498:8 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Mattheddleite |
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| 2.1km (1.3 miles) | ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 4.2km (2.6 miles) | ⓘBwlch Glas Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK |
| 8.1km (5.1 miles) | ⓘLlechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK |
| 9.9km (6.2 miles) | ⓘDaren Mine (Old Daren Mine; Darren Consolidated Mine; Daren United Mine; Great Darren Mine; Darren Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK |
| 16.9km (10.5 miles) | ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK |
| 21.6km (13.4 miles) | ⓘHendre Felen Mine (Hendre quarry), Ysbyty Ystwyth, Ceredigion, Wales, UK |
| 22.2km (13.8 miles) | ⓘEsgair Mwyn Mine, Ysbyty Ystwyth, Ceredigion, Wales, UK |
| References |
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Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK