| Locality | Latitude | Longitude | Distance | Bearing |
|---|
| Craiglwyd Quarry, Penmaenmawr, Conwy, Wales, UK | 53° 15' 33" N | 3° 55' 41" W | 3.1km (1.9 miles) | |
| Tal y Fan, Caerhun, Conwy, Wales, UK | 53° 14' 5" N | 3° 54' 10" W | 5.4km (3.3 miles) | |
| Unnamed workings north of Gyrn, Llanllechid, Gwynedd, Wales, UK | 53° 12' 3" N | 4° 1' 36" W | 7.2km (4.5 miles) | |
| Gyrn Stone Quarry, Llanllechid, Gwynedd, Wales, UK | 53° 11' 52" N | 4° 1' 34" W | 7.5km (4.7 miles) | |
| Unnamed Quarry west of Gyrn, Llanllechid, Gwynedd, Wales, UK | 53° 11' 57" N | 4° 1' 52" W | 7.5km (4.7 miles) | |
| Unnamed Quarry SW of Gyrn, Llanllechid, Gwynedd, Wales, UK | 53° 11' 52" N | 4° 1' 47" W | 7.6km (4.7 miles) | |
| Trecastell Mine (Llangelynin Mine), Henryd, Conwy, Wales, UK | 53° 15' 13" N | 3° 51' 31" W | 7.7km (4.8 miles) | |
| Cwm Ffrydias Trial Mine, Llanllechid, Gwynedd, Wales, UK | 53° 11' 33" N | 4° 1' 22" W | 7.9km (4.9 miles) | |
| Nant Ffrancon Formation, Llandygai, Gwynedd, Wales, UK | 53° 13' 45" N | 4° 5' 2" W | 8.0km (4.9 miles) | |
| Bryn-havod-y-wern Slate Quarry, Llanllechid, Gwynedd, Wales, UK | 53° 12' 8" N | 4° 3' 7" W | 8.1km (5.0 miles) | |
| Cwm Ffrydias Quarry, Llanllechid, Gwynedd, Wales, UK | 53° 11' 30" N | 4° 1' 33" W | 8.1km (5.0 miles) | |
| Tan-y-bwlch Slate Quarry, Llanllechid, Gwynedd, Wales, UK | 53° 11' 41" N | 4° 3' 17" W | 8.8km (5.5 miles) | |
| Llanllechid, Llanllechid, Gwynedd, Wales, UK | 53° 11' 49" N | 4° 3' 46" W | 9.0km (5.6 miles) | |
| Tan-y-bwlch Slate Quarry, Bethesda, Gwynedd, Wales, UK | 53° 11' 33" N | 4° 3' 25" W | 9.1km (5.7 miles) | |
| Moel Faban Slate Quarries, Bethesda, Gwynedd, Wales, UK | 53° 11' 17" N | 4° 3' 24" W | 9.5km (5.9 miles) | |
| Penrhyn Mine, Llandegai, Gwynedd, Wales, UK | 53° 12' 26" N | 4° 6' 14" W | 10.3km (6.4 miles) | |
| Bwlch Mine, Conwy, Conwy, Wales, UK | 53° 17' 49" N | 3° 49' 11" W | 11.2km (6.9 miles) | |
| New Mine, Great Orme, Llandudno, Conwy, Wales, UK | 53° 19' 45" N | 3° 50' 48" W | 11.6km (7.2 miles) | |
| Old Mine, Great Orme, Llandudno, Conwy, Wales, UK | 53° 19' 48" N | 3° 50' 44" W | 11.7km (7.3 miles) | |
| Ty Gwyn Mine, Great Orme, Llandudno, Conwy, Wales, UK | 53° 19' 33" N | 3° 49' 49" W | 12.2km (7.6 miles) | |
| Cedryn Slate Quarry, Dolgarrog, Conwy, Wales, UK | 53° 9' 13" N | 3° 54' 58" W | 12.2km (7.6 miles) | |
| Penrhyn Slate Quarry, Llandygai, Gwynedd, Wales, UK | 53° 9' 43" N | 4° 3' 51" W | 12.2km (7.6 miles) | |
| Unnamed quarry NNW of Llyn Cowlyd Dam, Dolgarrog, Conwy, Wales, UK | 53° 9' 21" N | 3° 53' 37" W | 12.5km (7.8 miles) | |
| Cae Coch Mine, Trefriw, Conwy, Wales, UK | 53° 10' 29" N | 3° 49' 58" W | 13.2km (8.2 miles) | |
| Marchlyn Mawr, Llanddeiniolen, Gwynedd, Wales, UK | 53° 8' 9" N | 4° 4' 8" W | 14.9km (9.3 miles) | |
| Marchlyn Slate Quarry, Llanddeiniolen, Gwynedd, Wales, UK | 53° 8' 29" N | 4° 5' 38" W | 15.2km (9.4 miles) | |
| Pen-y-Fridd slate quarry, Trefriw, Conwy, Wales, UK | 53° 8' 1" N | 3° 49' 51" W | 16.8km (10.4 miles) | |
| New Pandora Mine, Trefriw, Conwy, Wales, UK | 53° 7' 31" N | 3° 50' 34" W | 17.1km (10.6 miles) | |
| Dinorwic Quarry, Llanddeiniolen, Gwynedd, Wales, UK | 53° 7' 22" N | 4° 5' 59" W | 17.2km (10.7 miles) | |
| Hafna Mine, Trefriw, Conwy, Wales, UK | 53° 7' 22" N | 3° 49' 34" W | 18.0km (11.2 miles) | |
Craiglwyd Quarry, Penmaenmawr, Conwy, Wales, UK