| Locality type: | Mine |
| Classification |
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| Species: | Prehnite |
| Formula: | Ca2Al2Si3O10(OH)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Prehnite data |
| Locality Data: | Click here to view Aetna Exploration Copper Mine, Grant Township, Keweenaw County, Michigan, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 399201 |
| Long-form Identifier: | 1:3:399201:2 |
| GUID (UUID V4): | f1316aca-ae39-4c6c-9c73-f8babf297e8c |
| Nearest other occurrences of Prehnite |
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| 2.1km (1.3 miles) | ⓘHard Rock fissure, Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 4.9km (3.0 miles) | ⓘCopper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 5.0km (3.1 miles) | ⓘStar Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 5.0km (3.1 miles) | ⓘCape Mine, Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 5.2km (3.3 miles) | ⓘClark Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 5.3km (3.3 miles) | ⓘManganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| 5.5km (3.4 miles) | ⓘWashington Mine, Eagle Harbor, Keweenaw County, Michigan, USA |
| 6.1km (3.8 miles) | ⓘMedora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA |
| 6.6km (4.1 miles) | ⓘBete Grise Bay, Bete Grise, Grant Township, Keweenaw County, Michigan, USA |
| 6.8km (4.3 miles) | ⓘMandan Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA |
| References |
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