| Locality type: | Quarry |
| Classification |
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| Species: | K Feldspar var: Adularia |
| Formula: | KAlSi3O8 |
| Formation: | Secondary |
| Comments: | Part of a suite of microminerals pseudomorphing beryl: bertrandite, muscovite, albite, quartz. |
| Habit: | rectangular with acute pinacoids to flat pseudo-rhombohedral |
| Colour: | white to pale pink |
| Significance: | Unusual or interesting association, relationships with other species, pseudomorphism etc. - see notes. |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Associated Minerals Based on Photo Data: |
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| Bertrandite | ⓘ17 photos of Adularia associated with Bertrandite at this locality. |
| Muscovite | ⓘ14 photos of Adularia associated with Muscovite at this locality. |
| Beryl | ⓘ8 photos of Adularia associated with Beryl at this locality. |
| Quartz | ⓘ5 photos of Adularia associated with Quartz at this locality. |
| Albite | ⓘ3 photos of Adularia associated with Albite at this locality. |
| Microcline | ⓘ2 photos of Adularia associated with Microcline at this locality. |
| Wulfenite | ⓘ1 photo of Adularia associated with Wulfenite at this locality. |
| Columbite-(Fe)-Columbite-(Mn) Series | ⓘ1 photo of Adularia associated with Columbite-(Fe)-Columbite-(Mn) Series at this locality. |
| Data |
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| Mineral Data: | Click here to view Adularia data |
| Locality Data: | Click here to view Biermann Quarries (Bethel quarries) and tourmaline ledge, Bethel, Fairfield County, Connecticut, USA |
| Photo Gallery | View Gallery (5 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1211765 |
| Long-form Identifier: | 1:3:1211765:9 |
| GUID (UUID V4): | 73f08c9f-4402-42fa-9582-2b050026840d |
| Nearest other occurrences of Adularia |
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| 9.9km (6.1 miles) | ⓘDanbury, Fairfield County, Connecticut, USA |
| 11.4km (7.1 miles) | ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA |
| 12.2km (7.6 miles) | ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA |
| 14.5km (9.0 miles) | ⓘIlmenite locality, Bridgewater, Litchfield County, Connecticut, USA |
| 15.9km (9.9 miles) | ⓘState Route 25 road cuts, Trumbull, Fairfield County, Connecticut, USA |
| 21.8km (13.5 miles) | ⓘState Route 67 construction site, Oxford, New Haven County, Connecticut, USA |
| 22.2km (13.8 miles) | ⓘDerby, New Haven County, Connecticut, USA |
| 23.8km (14.8 miles) | ⓘLord Chamberlain Nursing and Rehabilitation Center (7003 Main Street; 7003 State Route 110), Stratford, Fairfield County, Connecticut, USA |
| 24.1km (15.0 miles) | ⓘBarrett Brothers Quarry (D and J Quarry), Beacon Falls, New Haven County, Connecticut, USA |
| 25.2km (15.6 miles) | ⓘTilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA |
| References |
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Biermann Quarries (Bethel quarries) and tourmaline ledge, Bethel, Fairfield County, Connecticut, USA