| Locality type: | Dam |
| Classification |
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| Species: | Beryl |
| Formula: | Be3Al2(Si6O18) |
| Formation: | Primary |
| Comments: | Subhedral crystals to 4 cm embedded in smoky quartz, albite, rosy microcline and fluorite. |
| Habit: | prismatic |
| Colour: | aqua |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Quartz | 10 |
| Microcline | 8 |
| Fluorite | 7 |
| Albite | 6 |
| Annite | 1 |
| Data |
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| Mineral Data: | Click here to view Beryl data |
| Locality Data: | Click here to view Mansfield Hollow Dam, Windham, Windham County, Connecticut, USA |
| Photo Gallery | View Gallery (7 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 97391 |
| Long-form Identifier: | 1:3:97391:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Beryl |
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| 4.6km (2.9 miles) | ⓘOak Street pegmatite, Willimantic, Windham, Windham County, Connecticut, USA |
| 5.4km (3.4 miles) | ⓘWillimantic, Windham, Windham County, Connecticut, USA |
| 30.1km (18.7 miles) | ⓘBrack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 32.0km (19.9 miles) | ⓘLinkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA |
| 32.5km (20.2 miles) | ⓘBecker Quarry, East Hampton, Middlesex County, Connecticut, USA |
| 32.9km (20.5 miles) | ⓘBishop Hill Schorl Locality, East Hampton, Middlesex County, Connecticut, USA |
| 34.1km (21.2 miles) | ⓘVespa stone quarry, East Hampton, Middlesex County, Connecticut, USA |
| 34.5km (21.4 miles) | ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA |
| 34.7km (21.6 miles) | ⓘNike prospect, Portland, Middlesex County, Connecticut, USA |
| 34.9km (21.7 miles) | ⓘState Forest Quarry No. 1, East Hampton, Middlesex County, Connecticut, USA |
| References |
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Mansfield Hollow Dam, Windham, Windham County, Connecticut, USA