| Locality type: | Prospect |
| Classification |
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| Species: | 'Columbite-(Fe)-Columbite-(Mn) Series' (not an IMA approved species) |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Associated Minerals Based on Photo Data: |
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| Albite | β1 photo of Columbite-(Fe)-Columbite-(Mn) Series associated with Albite at this locality. |
| Muscovite | β1 photo of Columbite-(Fe)-Columbite-(Mn) Series associated with Muscovite at this locality. |
| Quartz | β1 photo of Columbite-(Fe)-Columbite-(Mn) Series associated with Quartz at this locality. |
| Lepidolite | β1 photo of Columbite-(Fe)-Columbite-(Mn) Series associated with Lepidolite at this locality. |
| Data |
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| Mineral Data: | Click here to view Columbite-(Fe)-Columbite-(Mn) Series data |
| Locality Data: | Click here to view Brack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 693551 |
| Long-form Identifier: | 1:3:693551:1 |
| GUID (UUID V4): | a4f0d0b4-8638-47af-841e-3faccda80686 |
| Nearest other occurrences of Columbite-(Fe)-Columbite-(Mn) Series |
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| 6.4km (4.0 miles) | βHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 6.6km (4.1 miles) | βKnob Hill Quarry, Glastonbury, Hartford County, Connecticut, USA |
| 6.9km (4.3 miles) | βSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 6.9km (4.3 miles) | βHusband Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 7.1km (4.4 miles) | βGriswold Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 7.3km (4.5 miles) | βClark Hill prospect, East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 7.3km (4.5 miles) | βUnnamed pegmatite prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 7.3km (4.6 miles) | βEureka Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 7.8km (4.9 miles) | βPelton's Quarry, Portland, Middlesex County, Connecticut, USA |
| 7.9km (4.9 miles) | βWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA |
| References |
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Brack Gem prospect, East Glastonbury, Glastonbury, Hartford County, Connecticut, USA