| Locality type: | Lode |
| 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 Custer Mountain lode (Snookum mine), Custer, Custer Mining District, Custer County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 211314 |
| Long-form Identifier: | 1:3:211314:2 |
| GUID (UUID V4): | c6874c1b-1d89-4db5-8184-17ff9987458a |
| Nearest other occurrences of Sillimanite |
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| 3.1km (1.9 miles) | ⓘVictory Mine, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 3.7km (2.3 miles) | ⓘMica King Mine (Lost Bonanza; Cook Mine), Custer Mining District, Custer County, South Dakota, USA |
| 4.1km (2.5 miles) | ⓘElkhorn Mine (Tinsley Mine), Custer, Custer Mining District, Custer County, South Dakota, USA |
| 4.3km (2.7 miles) | ⓘHot Shot mine, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 4.7km (2.9 miles) | ⓘBuster lode (Buster Dike Mica Mine), Custer, Custer Mining District, Custer County, South Dakota, USA |
| 5.1km (3.2 miles) | ⓘHofert Arcade (Victory No. 1 Prospect), Custer Mining District, Custer County, South Dakota, USA |
| 5.3km (3.3 miles) | ⓘSouthern Black Hills Kyanite Mine, Southern Black Hills, Custer County, South Dakota, USA |
| 5.4km (3.3 miles) | ⓘSilver Dollar Mine, Custer Mining District, Custer County, South Dakota, USA |
| 5.8km (3.6 miles) | ⓘBeecher No. 3, Beecher Lode, Custer, Custer Mining District, Custer County, South Dakota, USA |
| 7.7km (4.8 miles) | ⓘRuby Reef Claims (Ruby Reef; Ruby Reef No. 1), Custer Mining District, Custer County, South Dakota, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | [University of Connecticut] at 20:42 14 January 2015 South Dakota is perhaps best known for its pegmatites, which...Hills are responsible for the accessibility of South Dakota’s itbundant and diverse mineral locations...secondary phosphate minerals. Although some pegmatite mining for feldspar still continues (Jacobson 1994). the...except for the Homestake mine, which has operated for more than 120 years, most mining in the area peaked in...and fewer chances to obtain any. However, some mining, mineral exploration, and mineral collecting continues |
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