| Locality type: | Mine |
| Classification |
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| Species: | Cummingtonite |
| Formula: | ◻Mg2Mg5(Si8O22)(OH)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Cummingtonite data |
| Locality Data: | Click here to view Montana Mine, Rochford Mining District, Lawrence County, South Dakota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 383608 |
| Long-form Identifier: | 1:3:383608:8 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Cummingtonite |
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| 3.3km (2.1 miles) | ⓘMontezuma Mine (Montezuma Nos. 3 to 7; Red Jim; New Montezuma), Rochford Mining District, Pennington County, South Dakota, USA |
| 4.3km (2.6 miles) | ⓘMary Belle Mine, Rochford Mining District, Pennington County, South Dakota, USA |
| 4.9km (3.1 miles) | ⓘGold King Mine (Gordelia Mine), Rochford Mining District, Pennington County, South Dakota, USA |
| 5.1km (3.2 miles) | ⓘStandby mine, Rochford Mining District, Pennington County, South Dakota, USA |
| 7.3km (4.5 miles) | ⓘKing of the West (North Star), Rochford Mining District, Pennington County, South Dakota, USA |
| 8.7km (5.4 miles) | ⓘGolden West Mine (Benedict Property), Rochford Mining District, Pennington County, South Dakota, USA |
| 11.5km (7.2 miles) | ⓘBlack Eagle Mine (Blair Group), Rochford Mining District, Pennington County, South Dakota, USA |
| 21.9km (13.6 miles) | ⓘHomestake Mine, Lead, Lead Mining District, Lawrence County, South Dakota, USA |
| 47.1km (29.3 miles) | ⓘNewark Group, Unorganized mining district [1], Custer County, South Dakota, USA |
| References |
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