| Locality type: | Mine |
| Classification |
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| Species: | Prehnite |
| Formula: | Ca2Al2Si3O10(OH)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Native Copper | 14 |
| Native Silver | 2 |
| Quartz | 2 |
| Calcite | 1 |
| Malachite | 1 |
| Datolite | 1 |
| Data |
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| Mineral Data: | Click here to view Prehnite data |
| Locality Data: | Click here to view Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA |
| Photo Gallery | View Gallery (4 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 97105 |
| Long-form Identifier: | 1:3:97105:4 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Prehnite |
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| 1.6km (1.0 miles) | ⓘMandan Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA |
| 1.7km (1.1 miles) | ⓘWashington Mine, Eagle Harbor Township, Keweenaw County, Michigan, USA |
| 2.0km (1.3 miles) | ⓘResolute Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA |
| 3.9km (2.5 miles) | ⓘHard Rock fissure, Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 6.1km (3.8 miles) | ⓘAetna Exploration Copper Mine, Grant Township, Keweenaw County, Michigan, USA |
| 6.8km (4.2 miles) | ⓘDelaware Mine (Delaware Conglomerate Mine), Delaware, Grant Township, Keweenaw County, Michigan, USA |
| 7.1km (4.4 miles) | ⓘBete Grise Bay, Bete Grise, Grant Township, Keweenaw County, Michigan, USA |
| 7.7km (4.8 miles) | ⓘConnecticut Mine, Eagle Harbor Township, Keweenaw County, Michigan, USA |
| 8.0km (5.0 miles) | ⓘDrexel Mine, Eagle Harbor Township, Keweenaw County, Michigan, USA |
| 9.4km (5.8 miles) | ⓘWaterbury Mine, Eagle Harbor Township, Keweenaw County, Michigan, USA |
| References |
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Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA