| Locality type: | Mine |
| Classification |
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| Species: | 'Biotite' (not an IMA approved species) |
| Formula: | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Cotopaxi Feldspar Mine (Cotopaxi Feldspar prospect; Henry pegmatite), Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 34982 |
| Long-form Identifier: | 1:3:34982:0 |
| GUID (UUID V4): | dc6f186b-a68b-4ec0-a031-7e2647f30ef5 |
| Nearest other occurrences of Biotite |
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| 1.1km (0.7 miles) | ⓘColorado Feldspar Pegmatite, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 4.6km (2.9 miles) | ⓘCotopaxi Mining District, Fremont County, Colorado, USA |
| 4.9km (3.0 miles) | ⓘCotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 7.5km (4.7 miles) | ⓘPine Ridge pegmatite, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 8.2km (5.1 miles) | ⓘMcCoy prospects, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 9.5km (5.9 miles) | ⓘDevil's Hole Mine, Fremont County, Colorado, USA |
| 9.6km (5.9 miles) | ⓘKnob Hill prospect (Knob Hill pegmatite), Howard, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 9.8km (6.1 miles) | ⓘSchaaf prospect, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 10.1km (6.3 miles) | ⓘHighway 50 roadcut, Texas Creek Area, Fremont County, Colorado, USA |
| 10.7km (6.6 miles) | ⓘChief lithium pegmatite, Texas Creek Area, Fremont County, Colorado, USA |
| References |
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