| Locality type: | Mine |
| Classification |
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| Species: | Pumpellyite-(Mg) var: Chlorastrolite |
| Formula: | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Data |
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| Mineral Data: | Click here to view Chlorastrolite data |
| Locality Data: | Click here to view Iron City Mine (Empire Mine), Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 852954 |
| Long-form Identifier: | 1:3:852954:1 |
| GUID (UUID V4): | 64a74e44-7856-4829-9cef-b0d0303a3fab |
| Nearest other occurrences of Chlorastrolite |
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| 4.5km (2.8 miles) | ⓘMedora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA |
| 11.4km (7.1 miles) | ⓘDelaware Mine (Delaware Conglomerate Mine), Delaware, Grant Township, Keweenaw County, Michigan, USA |
| 13.9km (8.6 miles) | ⓘWaterbury Mine, Eagle Harbor, Keweenaw County, Michigan, USA |
| 17.6km (10.9 miles) | ⓘCentral Exploration Mine, Central, Houghton Township, Keweenaw County, Michigan, USA |
| 18.5km (11.5 miles) | ⓘNorthwestern Mine, Central, Houghton Township, Keweenaw County, Michigan, USA |
| 18.7km (11.6 miles) | ⓘCopper Falls, Eagle Harbor, Keweenaw County, Michigan, USA |
| 19.0km (11.8 miles) | ⓘCentral Mine, Central, Houghton Township, Keweenaw County, Michigan, USA |
| 24.4km (15.2 miles) | ⓘSt. Clair Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA |
| 25.3km (15.7 miles) | ⓘPhoenix Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA |
| 28.3km (17.6 miles) | ⓘCliff Mine, Allouez Township, Keweenaw County, Michigan, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | Michigan’s Copper Country News from the Keweenaw Recent Mineral Finds in Michigan’s Copper Country Downloaded...A l t h o u g h commercial copper mining has come to an end in the Copper Country, specimens reminiscent...heyday of mining are still being recovered. When one thinks of superb specimens from the Keweenaw, memories...groups of copper and silver crystals, colorful porcelaneous nodules of datolite, and copper inclusions...courtesy Michigan Technological University Archives and Copper Country Historical Collections, Michigan Technological |  | | Journal (article/letter/editorial) | | Lake Superior copper deposits, home to the world’s largest occurrence of native copper. Indeed, many...sport flecks of native copper, and specimens exist of datolite intergrown with copper crystals, but that’s...that’s getting ahead of the story. Michigan’s Copper Country datolite has been collected, prized, fashioned...in celebrating the rich mineral heritage of the Keweenaw Peninsula’s datolite by diving into this article...Dyl II, Director A. E. Seumnii Mineral Museum Michigan Technological University 170 ROCKS 81MINERALS |
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Iron City Mine, Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA