| Locality type: | Mine |
| Classification |
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| Species: | Cummingtonite |
| Formula: | ◻{Mg2}{Mg5}(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 Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1493862 |
| Long-form Identifier: | 1:3:1493862:1 |
| GUID (UUID V4): | d1660f4b-be0a-45ec-ace3-80b5eb2debd2 |
| Nearest other occurrences of Cummingtonite |
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|
|
| 14.1km (8.7 miles) | ⓘDevil's Hole Mine, Fremont County, Colorado, USA |
| 26.6km (16.6 miles) | ⓘGreen Mountain Mine (Copper Boy Mine), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA |
| 38.1km (23.7 miles) | ⓘSedalia Mine (Sedalia Copper Mine), Sedalia Mining District, Chaffee County, Colorado, USA |
| 42.4km (26.3 miles) | ⓘBetty Mine (Lone Chimney Mine; Betty Lowe), Guffey Mining District, Park County, Colorado, USA |
| References |
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Spry, P. G., McFadden, S., Teale, G. S., Alers, B., Shallow, J. M., & Glenn, J. M. (2021). Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 104632. |
