| Locality type: | Prospect |
| Classification |
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| Species: | Sillimanite |
| Formula: | Al2(SiO4)O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Sillimanite data |
| Locality Data: | Click here to view Eureka Lode Prospect (Hultz), Custer County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 765795 |
| Long-form Identifier: | 1:3:765795:5 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Sillimanite |
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| 2.9km (1.8 miles) | ⓘOreville, Custer County, South Dakota, USA |
| 3.3km (2.0 miles) | ⓘU.S. highways 16/385 & State route 87 intersection area, Oreville Mining District, Pennington County, South Dakota, USA |
| 6.7km (4.2 miles) | ⓘSummit Peak, Pennington County, South Dakota, USA |
| 8.4km (5.2 miles) | ⓘHofert Arcade (Victory No. 1 Prospect), Custer Mining District, Custer County, South Dakota, USA |
| 8.5km (5.3 miles) | ⓘVictory Mine, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 11.6km (7.2 miles) | ⓘCuster Mountain lode (Snookum mine), Custer, Custer Mining District, Custer County, South Dakota, USA |
| 12.9km (8.0 miles) | ⓘMica King Mine (Lost Bonanza; Cook Mine), Custer Mining District, Custer County, South Dakota, USA |
| 13.1km (8.2 miles) | ⓘHugo Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| 13.6km (8.4 miles) | ⓘElkhorn Mine (Tinsley Mine), Custer, Custer Mining District, Custer County, South Dakota, USA |
| 13.8km (8.6 miles) | ⓘHot Shot mine, Custer, Custer Mining District, Custer County, South Dakota, USA |
| References |
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