| Locality type: | Mine |
| Classification |
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| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view Wheal Maudlin (Wheal Mawdlin; Wheal Magdalen), Lostwithiel, Cornwall, England, UK |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 8250 |
| Long-form Identifier: | 1:3:8250:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Opal |
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| 1.7km (1.1 miles) | ⓘRestormel Royal Iron Mine (Trinity Mine), Lostwithiel, Cornwall, England, UK |
| 6.5km (4.0 miles) | ⓘLady Rashleigh Consols, Prideaux, Luxulyan (Luxullian), Cornwall, England, UK |
| 8.7km (5.4 miles) | ⓘRock Hill China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK |
| 8.8km (5.5 miles) | ⓘGoonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK |
| 9.3km (5.8 miles) | ⓘGreat Wheal Prosper China Clay Pit, Trezaise (Tresayes), Roche, Cornwall, England, UK |
| 9.6km (6.0 miles) | ⓘGunheath China Clay Pit, Stenalees, Treverbyn, Cornwall, England, UK |
| 9.7km (6.0 miles) | ⓘCarclaze Old Tin Pit, Carclaze China Clay Pit (Baal China Clay Pit), Carludon, Treverbyn, Cornwall, England, UK |
| 11.4km (7.1 miles) | ⓘGreat Longstone China Clay Pit, Longstone Downs, St Mewan, Cornwall, England, UK |
| 13.3km (8.3 miles) | ⓘBlackpool China Clay Pit, Trewoon, St Mewan, Cornwall, England, UK |
| 14.1km (8.8 miles) | ⓘStenna Gwyn Mine (Stennagwyn Mine), Foxhole, St Stephen-in-Brannel, Cornwall, England, UK |
| References |
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