| Locality type: | Quarry |
| Classification |
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| Species: | Marcasite |
| Formula: | FeS2 |
| Comments: | As minor part of pyrite aggregates (reflected light microscopy). |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Marcasite data |
| Locality Data: | Click here to view Portland Limestone quarry, Penrose, Fremont County, Colorado, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 414780 |
| Long-form Identifier: | 1:3:414780:0 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Marcasite |
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| 26.2km (16.3 miles) | ⓘDawson Gold project, Fremont County, Colorado, USA |
| 37.3km (23.2 miles) | ⓘIndependence Mine (Stratton Independence Mine), Cripple Creek, Cripple Creek Mining District, Teller County, Colorado, USA |
| 37.8km (23.5 miles) | ⓘAjax Mine, Cripple Creek Mining District, Teller County, Colorado, USA |
| 39.1km (24.3 miles) | ⓘCripple Creek & Victor Gold Mine (Cresson Mine), Eclipse Gulch, Cripple Creek Mining District, Teller County, Colorado, USA |
| 45.6km (28.3 miles) | ⓘMarion Mine, Custer County, Colorado, USA |
| 47.0km (29.2 miles) | ⓘGlen Williams Mine (Williams Mine), Tallahassee Creek Mining District, Fremont County, Colorado, USA |
| 60.6km (37.6 miles) | ⓘCotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 92.4km (57.4 miles) | ⓘSedalia Mine (Sedalia Copper Mine), Sedalia Mining District, Chaffee County, Colorado, USA |
| References |
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