| Locality type: | Quarry |
| Classification |
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| Species: | Opal var: Opal-AN |
| Formula: | SiO2 · nH2O |
| Comments: | nearly invisible coatings that fluoresce bright green |
| Colour: | colorless |
| Luminescent properties: | green |
| Abundance at site: | Common |
| Confirmation |
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|
| Validity: | Confirmed |
| Confirmation Methods: | Visual (Fluorescence) |
| Associated Minerals Based on Photo Data: |
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| Fluorapatite | 6 |
| Albite | 5 |
| - var Cleavelandite | 1 |
| Quartz | 4 |
| Montebrasite | 3 |
| Pollucite | 2 |
| Lepidolite | 2 |
| Spodumene | 2 |
| Elbaite | 1 |
| Almandine | 1 |
| Data |
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| Mineral Data: | Click here to view Opal-AN data |
| Locality Data: | Click here to view Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA |
| Photo Gallery | View Gallery (2 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 657265 |
| Long-form Identifier: | 1:3:657265:5 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Opal-AN |
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| 0.2km (0.1 miles) | ⓘGotta-Walden Prospect, Portland, Middlesex County, Connecticut, USA |
| 1.2km (0.7 miles) | ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA |
| 1.5km (0.9 miles) | ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA |
| 2.2km (1.4 miles) | ⓘSimpson prospect #1, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 2.3km (1.4 miles) | ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 2.4km (1.5 miles) | ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 2.5km (1.6 miles) | ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA |
| 2.8km (1.7 miles) | ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 3.0km (1.8 miles) | ⓘEureka Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA |
| 3.0km (1.8 miles) | ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| References |
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Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA