| Locality type: | Tunnel |
| Classification |
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| Species: | Almandine |
| Formula: | Fe32+Al2(SiO4)3 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Almandine data |
| Locality Data: | Click here to view Keystone Tunnel, Pennington County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 212406 |
| Long-form Identifier: | 1:3:212406:3 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Almandine |
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| 0.3km (0.2 miles) | ⓘHighway 16A, Keystone Mining District, Pennington County, South Dakota, USA |
| 0.9km (0.5 miles) | ⓘHoly Terror Mine, Keystone Gold Mining District, Pennington County, South Dakota, USA |
| 2.1km (1.3 miles) | ⓘBob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| 2.5km (1.5 miles) | ⓘEtta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| 3.4km (2.1 miles) | ⓘHugo Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA |
| 3.7km (2.3 miles) | ⓘTepee Gulch Area, Keystone Mining District, Pennington County, South Dakota, USA |
| 8.5km (5.3 miles) | ⓘRockerville, Pennington County, South Dakota, USA |
| 13.0km (8.1 miles) | ⓘU.S. highways 16/385 & State route 87 intersection area, Oreville Mining District, Pennington County, South Dakota, USA |
| 17.1km (10.6 miles) | ⓘUS highway 16 roadside occurrence, Custer County, South Dakota, USA |
| 20.8km (12.9 miles) | ⓘCrown Mine (McMackin Mine), Custer, Custer Mining District, Custer County, South Dakota, USA |
| References |
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