| Locality type: | Mine |
| Classification |
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| Species: | 'Tourmaline' (not an IMA approved species) |
| Formula: | AD3G6(T6O18)(BO3)3X3Z |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Tourmaline data |
| Locality Data: | Click here to view Trewidden Bal, Trewidden, Madron, Cornwall, England, UK |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 669792 |
| Long-form Identifier: | 1:3:669792:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Tourmaline |
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| 0.8km (0.5 miles) | ⓘAvarack & Nancothan Mine (aka Drift Moor Consols), Paul, Cornwall, England, UK |
| 2.9km (1.8 miles) | ⓘWherry Mine, Wherrytown, Penzance, Cornwall, England, UK |
| 3.7km (2.3 miles) | ⓘCaer Bran Mine (Carn Bran Mine), Sancreed, Cornwall, England, UK |
| 4.8km (3.0 miles) | ⓘBartinney Mine (West Wheal Virgin), Bartinney Downs, St Just, Cornwall, England, UK |
| 5.2km (3.2 miles) | ⓘLeswidden China Clay Works, St Just, Cornwall, England, UK |
| 6.8km (4.2 miles) | ⓘCastle-an-Dinas Quarry, Higher Trenowin, Ludgvan, Cornwall, England, UK |
| 7.3km (4.5 miles) | ⓘMarazion Beach, Marazion, Cornwall, England, UK |
| 7.4km (4.6 miles) | ⓘKelynack Mine, Cot Valley, St Just, Cornwall, England, UK |
| 7.6km (4.7 miles) | ⓘWheal Ellen, Carallack, St Just, Cornwall, England, UK |
| 7.7km (4.8 miles) | ⓘBoscaswell Downs Mine, Pendeen, St Just, Cornwall, England, UK |
| References |
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