| Locality type: | Mine |
| Classification |
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| Species: | Beryl var: Heliodor |
| Formula: | Be3Al2(Si6O18) |
| Colour: | yellow |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Data |
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| Mineral Data: | Click here to view Heliodor data |
| Locality Data: | Click here to view Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 685984 |
| Long-form Identifier: | 1:3:685984:8 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Heliodor |
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| 0.1km (0.1 miles) | ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| 0.9km (0.6 miles) | ⓘPegmatite prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| 2.9km (1.8 miles) | ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA |
| 3.7km (2.3 miles) | ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA |
| 5.3km (3.3 miles) | ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 10.1km (6.3 miles) | ⓘBecker Quarry, East Hampton, Middlesex County, Connecticut, USA |
| 10.3km (6.4 miles) | ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA |
| 12.1km (7.5 miles) | ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA |
| 16.4km (10.2 miles) | ⓘCivilian Conservation Corps prospect (CCC prospect; Cook columbite prospect), Haddam, Middlesex County, Connecticut, USA |
| 17.0km (10.6 miles) | ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA |
| References |
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