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Chalcedony from
Ashford Black Marble mines, Ashford-in-the-Water, Derbyshire, England, UK

Classification
Species:Quartz var: Chalcedony
Confirmation
Validity:Believed Valid
References
References:Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Ashford Black Marble mines, Ashford-in-the-Water, Derbyshire, England, UK
Nearest other occurrences of Chalcedony
1.1km (0.7 miles) A Dirtlow Rake, Ashford-in-the-Water, Derbyshire, England, UK
2.0km (1.2 miles) B Holme Bank Mine (Castle Hill Mine), Bakewell, Derbyshire, England, UK
8.8km (5.5 miles) C Hucklow Edge, Great Hucklow, Derbyshire, England, UK
12.0km (7.5 miles) D Bradwell Moor, Bradwell, Derbyshire, England, UK
13.8km (8.6 miles) E Cavedale, Castleton, Derbyshire, England, UK
14.3km (8.9 miles) F Masson Hill and mines, Matlock, Derbyshire, England, UK
14.8km (9.2 miles) G Dale Mine, Warslow, Warslow and Elkstones, Staffordshire, England, UK
14.8km (9.2 miles) H High Tor, Matlock, Derbyshire, England, UK
107.7km (66.9 miles) I New Venture Mine (Stiperstones Mine), Stiperstones, Hope-Shelve District, Shropshire, England, UK
110.4km (68.6 miles) J Roman Gravels Mine, Hope-Shelve District, Shropshire, England, UK
111.2km (69.1 miles) K Rock Mine, Callow Hill-Bog District, Shropshire, England, UK
112.3km (69.8 miles) L Radley Mine, Black Radley Hill, Callow Hill-Bog District, Shropshire, England, UK
112.6km (70.0 miles) M Grit Mines (East Grit; White Grit; Old Grit; Foxholes), Hope-Shelve District, Shropshire, England, UK
128.7km (80.0 miles) N Beach and Cliffs, Withernsea, East Yorkshire (East Riding of Yorkshire), England, UK
131.8km (81.9 miles) O Fremington Edge Chert Mine and Workings, Reeth, Swaledale, North Pennines, North Yorkshire, England, UK
132.0km (82.0 miles) P Winterings Edge, Gunnerside Gill, Swaledale, North Pennines, North Yorkshire, England, UK
132.3km (82.2 miles) Q Calver Hill, Reeth, Swaledale, North Pennines, North Yorkshire, England, UK
165.9km (103.1 miles) R Eycott Hill, Keswick, Keswick District, Cumbria, England, UK
166.0km (103.1 miles) S Falcon Crag, Keswick District, Cumbria, England, UK
178.4km (110.9 miles) T Sikehead Mine, Hunstanworth, Derwent Valley, North Pennines, Co. Durham, England, UK
179.0km (111.2 miles) U Whiteheaps Mine, Hunstanworth, Derwent Valley, North Pennines, Co. Durham, England, UK
180.4km (112.1 miles) V Haile Moor Mine, Egremont, West Cumberland Iron Field, Cumbria, England, UK
181.4km (112.7 miles) W Force Crag Mine (Force Craig Mine), Coledale, Braithwaite District, Cumbria, England, UK
182.6km (113.5 miles) X Reeding Mine, Blanchland, Derwent Valley, North Pennines, Northumberland, England, UK
182.7km (113.5 miles) Y Shildon Mines, Blanchland, Derwent Valley, North Pennines, Northumberland, England, UK
186.8km (116.0 miles) Z Higher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck Fells, Cumbria, England, UK
186.8km (116.1 miles) 0 Driggith Mine (Driggeth Mine), Caldbeck Fells, Cumbria, England, UK
187.3km (116.4 miles) 1 Roughton Gill Mine, Roughton Gill, Caldbeck Fells, Cumbria, England, UK
190.2km (118.2 miles) 2 Sandwith Mine, Whitehaven, Cumbria, England, UK
195.2km (121.3 miles) 3 Cattybrook Quarry, Almondsbury, Gloucestershire, England, UK
201.6km (125.3 miles) 4 Risca Quarry, Risca, Caerphilly, Wales, UK
225.6km (140.2 miles) 5 Banwell Hill, Banwell, Somerset, England, UK
Mineral and/or Locality  
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