| Locality type: | Mine |
| Classification |
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| Species: | Bertrandite |
| Formula: | Be4(Si2O7)(OH)2 |
| Formation: | Secondary |
| Comments: | As aggregates of microcrystals in voids in cleavalandite/quartz matrix formed by the natural dissolution of beryl, associated with clay. |
| Habit: | tabular microcrystals |
| Colour: | white to creamy |
| 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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| Columbite-(Fe)-Columbite-(Mn) Series | β1 photo of Bertrandite associated with Columbite-(Fe)-Columbite-(Mn) Series at this locality. |
| Albite | β1 photo of Bertrandite associated with Albite at this locality. |
| Quartz | β1 photo of Bertrandite associated with Quartz at this locality. |
| Data |
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| Mineral Data: | Click here to view Bertrandite data |
| Locality Data: | Click here to view Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine; Old Lithia Mine; Chatham Lithia Mine), East Hampton (Chatham), Middlesex County, Connecticut, USA |
| Photo Gallery | View Gallery (2 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 599559 |
| Long-form Identifier: | 1:3:599559:2 |
| GUID (UUID V4): | af4a77b0-4496-4b0c-82b7-8287a838dd8d |
| Nearest other occurrences of Bertrandite |
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| 1.6km (1.0 miles) | βWorth and Selden Quarries (Victoria Quarry), East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 3.3km (2.1 miles) | βQuarry Hill (Brainerd Quarries; Shailor Quarries), Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 4.3km (2.7 miles) | βConnecticut Yankee atomic power plant, Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 4.6km (2.8 miles) | βSlocum prospect, East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 6.7km (4.2 miles) | βState Route 9 Interchange 13 - Beaver Meadow Road, Haddam, Middlesex County, Connecticut, USA |
| 6.9km (4.3 miles) | βState Forest Quarry No. 2 (State Forest #2 Mica Mine; Carini Quarry), Cobalt, East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 7.1km (4.4 miles) | βHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA |
| 7.4km (4.6 miles) | βLong Hill prospects (Turkey Hill prospects), Haddam, Middlesex County, Connecticut, USA |
| 7.6km (4.7 miles) | βTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA |
| 7.7km (4.8 miles) | βWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA |
| References |
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Anderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA