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Chalcedony from
Restormel Royal Iron Mine (Trinity Mine), Lostwithiel, St Austell District, Cornwall, England, UK

Classification
Species:Quartz var: Chalcedony
Confirmation
Validity:Believed Valid
References
References:Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386
Associated Minerals Based on Photo Data:
Siderite2 photos of Chalcedony associated with Siderite at this locality.
Hematite1 photo of Chalcedony associated with Hematite at this locality.
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Restormel Royal Iron Mine (Trinity Mine), Lostwithiel, St Austell District, Cornwall, England, UK
Nearest other occurrences of Chalcedony
1.7km (1.1 miles) A Wheal Maudlin (Wheal Mawdlin; Wheal Magdalen), Lostwithiel, St Austell District, Cornwall, England, UK
17.9km (11.1 miles) B West Wheal Mary Ann (West Mary Ann Mine), Roseland, Menheniot, Liskeard District, Cornwall, England, UK
19.0km (11.8 miles) C Wheal Mary Ann, Menheniot, Liskeard District, Cornwall, England, UK
33.8km (21.0 miles) D Penhale Mine (Penhale United Mine; Penhale and Lomax Mine), Penhale Sands, Perranzabuloe, St Agnes District, Cornwall, England, UK
33.9km (21.1 miles) E Gunnislake Clitters Mine, Clitters United Mines, Gunnislake, Calstock, Callington District, Cornwall, England, UK
40.4km (25.1 miles) F Walkham and Poldice Mine (Wheal Walkham), Buckland Monachorum, Tavistock District, Devon, England, UK
40.7km (25.3 miles) G Carharrack Mine, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK
43.6km (27.1 miles) H Tresavean Mine, Lanner, Camborne - Redruth - St Day District, Cornwall, England, UK
43.9km (27.3 miles) I Pednandrea Mine (Pedn-an-Drea Mine), Redruth, Camborne - Redruth - St Day District, Cornwall, England, UK
44.3km (27.5 miles) J Wheal Sparnon, Redruth, Camborne - Redruth - St Day District, Cornwall, England, UK
46.0km (28.6 miles) K North Mine (East Wheal Friendship), Devon United Mines, Peter Tavy, Tavistock District, Devon, England, UK
46.3km (28.8 miles) L North Pool Mine, West Tolgus group, East Pool and Agar Mine, Carn Brea, Camborne - Redruth - St Day District, Cornwall, England, UK
46.7km (29.0 miles) M Carn Brea Mine, Carn Brea and Tincroft United Mine, Carn Brea, Camborne - Redruth - St Day District, Cornwall, England, UK
46.9km (29.1 miles) N East Pool Mine (Pool Old Bal), East Pool and Agar Mine, Carn Brea, Camborne - Redruth - St Day District, Cornwall, England, UK
53.1km (33.0 miles) O Polcrebo Downs Mine, Nancegollan, Helston, Crowan, Mount's Bay District, Cornwall, England, UK
53.9km (33.5 miles) P Trevascus Mine (Trevaskus Mine; Trevaskis Mine), Carnhell Green, Gwinear-Gwithian, St Erth - Gwithian Area, Cornwall, England, UK
54.2km (33.6 miles) Q New Rosewarne Mine, Rosewarne United Mines, Gwinear-Gwithian, St Erth - Gwithian Area, Cornwall, England, UK
55.3km (34.4 miles) R Relistian Mine (Relistien Mine; Relistian Consols), Reawla, Gwinear, Gwinear-Gwithian, St Erth - Gwithian Area, Cornwall, England, UK
55.7km (34.6 miles) S Pedn Boar Point, Coverack, St Keverne, Lizard Peninsula, Cornwall, England, UK
56.7km (35.2 miles) T Alfred Consols (East Wheal Alfred; Laity Hills Mine), Great Wheal Alfred (Alfred Consols), Hayle, St Erth - Gwithian Area, Cornwall, England, UK
57.2km (35.6 miles) U Wheal Alfred, Great Wheal Alfred (Alfred Consols), Hayle, St Erth - Gwithian Area, Cornwall, England, UK
57.3km (35.6 miles) V Godolphin Mine (Godolphin Bal), Godolphin Cross, Breage, Mount's Bay District, Cornwall, England, UK
58.6km (36.4 miles) W Loe Bar, Porthleven, Mount's Bay District, Cornwall, England, UK
63.3km (39.3 miles) X Kynance Cove, Landewednack, Lizard Peninsula, Cornwall, England, UK
63.4km (39.4 miles) Y Caerthillian Cove, Landewednack, Lizard Peninsula, Cornwall, England, UK
69.1km (43.0 miles) Z Haytor Mine, Ilsington, Dartmoor & Teign Valley District, Devon, England, UK
71.2km (44.2 miles) 0 Penlee Quarry, Newlyn, Paul, Mount's Bay District, Cornwall, England, UK
75.9km (47.1 miles) 1 Pendeen Consols, Pendeen, St Just, St Just District, Cornwall, England, UK
76.3km (47.4 miles) 2 Boscaswell Downs Mine, Pendeen, St Just, St Just District, Cornwall, England, UK
76.9km (47.8 miles) 3 Geevor Mine (North Levant Mine), Pendeen, St Just, St Just District, Cornwall, England, UK
77.1km (47.9 miles) 4 Balleswidden Mine, St Just, St Just District, Cornwall, England, UK
77.6km (48.2 miles) 5 Levant Mine, Trewellard, St Just, St Just District, Cornwall, England, UK
78.2km (48.6 miles) 6 Wheal Hen, Botallack Mine sett, Botallack, St Just, St Just District, Cornwall, England, UK
78.2km (48.6 miles) 7 Wheal Cock, Botallack Mine sett, Botallack, St Just, St Just District, Cornwall, England, UK
78.3km (48.6 miles) 8 Grylls Bunny, Botallack Mine sett, Botallack, St Just, St Just District, Cornwall, England, UK
78.3km (48.7 miles) 9 Botallack Mine sett, Botallack, St Just, St Just District, Cornwall, England, UK
Mineral and/or Locality  
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