| 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 Rainbow No. 4 Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 382233 |
| Long-form Identifier: | 1:3:382233:3 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Tourmaline |
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| 0.5km (0.3 miles) | ⓘEruption Lode (Volcano Lode), Custer Mining District, Custer County, South Dakota, USA |
| 0.9km (0.5 miles) | ⓘBig Tom Mine (Kem Lode), Custer Mining District, Custer County, South Dakota, USA |
| 1.3km (0.8 miles) | ⓘDubuque and Royal Flush Claims (Gayle Lode), Custer Mining District, Custer County, South Dakota, USA |
| 1.7km (1.0 miles) | ⓘWhite Mica Lode and White Mica No. 1 Lode Mine, Custer Mining District, Custer County, South Dakota, USA |
| 2.1km (1.3 miles) | ⓘRuberta Mining and Milling Company Mine, Custer County, South Dakota, USA |
| 2.2km (1.3 miles) | ⓘWarren Draw Mine (Warren Gulch Mine), Custer Mining District, Custer County, South Dakota, USA |
| 2.4km (1.5 miles) | ⓘWright Mica Lode, Custer Mining District, Custer County, South Dakota, USA |
| 2.8km (1.7 miles) | ⓘLincoln No. 7 Lode Prospect, Custer Mining District, Custer County, South Dakota, USA |
| 2.9km (1.8 miles) | ⓘOne Point Lode Occurrence, Custer Mining District, Custer County, South Dakota, USA |
| 3.1km (1.9 miles) | ⓘInca Mine, Custer Mining District, Custer County, South Dakota, USA |
| References |
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Rainbow No. 4 Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA