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Chalcedony from
Risca Quarry, Risca, Caerphilly, Wales, UK

Locality type:Quarry
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Quality for species:Good crystals or rich for species - important (!)
Confirmation
Validity:Believed Valid
References
References:No reference listed
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Risca Quarry, Risca, Caerphilly, Wales, UK
Nearest other occurrences of Chalcedony
36.2km (22.5 miles) A Banwell Hill, Banwell, North Somerset, Somerset, England, UK
36.4km (22.6 miles) B Cattybrook Quarry, Almondsbury, South Gloucestershire, England, UK
57.9km (36.0 miles) C Dulcote Quarry, Wells, Mendip, Somerset, England, UK
86.5km (53.8 miles) D Broadhembury, East Devon, Devon, England, UK
100.7km (62.6 miles) E Lyme Regis Beach, Lyme Regis, West Dorset, Dorset, England, UK
101.1km (62.8 miles) F Pinhay Bay, Pinhay, East Devon, Devon, England, UK
101.9km (63.3 miles) G Haven Cliff, Axmouth, East Devon, Devon, England, UK
102.0km (63.4 miles) H Seaton Hole, Seaton, East Devon, Devon, England, UK
103.9km (64.6 miles) I Weston Mouth, Sidmouth, East Devon, Devon, England, UK
104.5km (64.9 miles) J Radley Mine, Black Radley Hill, Callow Hill-Bog District, Shropshire, England, UK
105.4km (65.5 miles) K Rock Mine, Callow Hill-Bog District, Shropshire, England, UK
105.7km (65.7 miles) L Mickleton, Cotswold, Gloucestershire, England, UK
106.6km (66.2 miles) M Grit Mines (East Grit; White Grit; Old Grit; Foxholes), Hope-Shelve District, Shropshire, England, UK
108.6km (67.5 miles) N Roman Gravels Mine, Hope-Shelve District, Shropshire, England, UK
109.0km (67.7 miles) O New Venture Mine (Stiperstones Mine), Stiperstones, Hope-Shelve District, Shropshire, England, UK
112.7km (70.0 miles) P Buller's Hill quarry, Haldon Forrest, Kenton, Teignbridge, Devon, England, UK
123.5km (76.8 miles) Q Haytor Mine, Ilsington, Teignbridge, Devon, England, UK
133.1km (82.7 miles) R North Mine (East Wheal Friendship), Devon United Mines, Peter Tavy, West Devon, Devon, England, UK
142.0km (88.3 miles) S Walkham and Poldice Mine (Wheal Walkham), Buckland Monachorum, West Devon, Devon, England, UK
144.8km (90.0 miles) T Gunnislake Clitters Mine, Clitters United Mines, Gunnislake, Calstock, Cornwall, England, UK
159.5km (99.1 miles) U Wheal Mary Ann, Menheniot, Cornwall, England, UK
159.9km (99.4 miles) V West Wheal Mary Ann (West Mary Ann Mine), Roseland, Menheniot, Cornwall, England, UK
164.3km (102.1 miles) W Pen-y-chain, Morfa Abererch, Lleyn Peninsula, Gwynedd, Wales, UK
172.9km (107.4 miles) X Restormel Royal Iron Mine (Trinity Mine), Lostwithiel, Cornwall, England, UK
173.1km (107.5 miles) Y Wheal Maudlin (Wheal Mawdlin; Wheal Magdalen), Lostwithiel, Cornwall, England, UK
173.4km (107.8 miles) Z The Undercliffs, St Lawrence, Ventnor, Isle of Wight, England, UK
187.3km (116.4 miles) 0 Dale Mine, Warslow, Warslow and Elkstones, Staffordshire, England, UK
197.0km (122.4 miles) 1 Masson Hill and mines, Matlock, Derbyshire, England, UK
197.9km (122.9 miles) 2 High Tor, Matlock, Derbyshire, England, UK
200.7km (124.7 miles) 3 Dirtlow Rake, Ashford-in-the-Water, Derbyshire, England, UK
201.6km (125.3 miles) 4 Ashford Black Marble mines, Ashford-in-the-Water, Derbyshire, England, UK
202.5km (125.8 miles) 5 Holme Bank Mine (Castle Hill Mine), Bakewell, Derbyshire, England, UK
208.7km (129.7 miles) 6 Hucklow Edge, Great Hucklow, Derbyshire, England, UK
209.1km (129.9 miles) 7 Bradwell Moor, Bradwell, Derbyshire, England, UK
211.2km (131.3 miles) 8 Cavedale, Castleton, Derbyshire, England, UK
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