| Locality type: | Quarry |
| 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 |
| Comments: | anhedral grains in the host schist |
| Quality for species: | Rock forming mineral/non-crystalline/little interest for collectors.(##) |
| Abundance at site: | Very common |
| 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 Unnamed quartz mine (Judd's Bridge kyanite locality), Washington, Litchfield County, Connecticut, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 131551 |
| Long-form Identifier: | 1:3:131551:6 |
| GUID (UUID V4): | f4557eb2-3b0c-4841-83c8-3a85987686f4 |
| Nearest other occurrences of Biotite |
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| 3.1km (1.9 miles) | ⓘRockside Quarry (Mine Hill Quarry), Mine Hill (Ore Hill), Roxbury, Litchfield County, Connecticut, USA |
| 10.6km (6.6 miles) | ⓘGreen's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield County, Connecticut, USA |
| 12.7km (7.9 miles) | ⓘNonnewaug River Industrial Park, Woodbury, Litchfield County, Connecticut, USA |
| 14.4km (9.0 miles) | ⓘU. S. Route 7 Expressway (Brookfield Bypass), Brookfield, Fairfield County, Connecticut, USA |
| 16.7km (10.4 miles) | ⓘMount Prospect complex (Prospect Hill complex; Prospect Mountain complex), Litchfield, Litchfield County, Connecticut, USA |
| 17.1km (10.7 miles) | ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA |
| 20.0km (12.5 miles) | ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA |
| 21.3km (13.2 miles) | ⓘCurtis Quarry (Southford Quarry; Southford pegmatite; Southbury rose quartz quarry; Bridgeport Woodfinishing Co. Quarry; Hulls Hill), Southford, Southbury, New Haven County, Connecticut, USA |
| 22.0km (13.6 miles) | ⓘUnnamed quarry, Waterbury, New Haven County, Connecticut, USA |
| 22.1km (13.8 miles) | ⓘWaterbury Road quarry, Thomaston, Litchfield County, Connecticut, USA |
| References |
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