| 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 | ⓘ7 photos of Opal-AN associated with Fluorapatite at this locality. |
| Albite | ⓘ7 photos of Opal-AN associated with Albite at this locality. |
| Quartz | ⓘ4 photos of Opal-AN associated with Quartz at this locality. |
| Montebrasite | ⓘ3 photos of Opal-AN associated with Montebrasite at this locality. |
| Spodumene | ⓘ2 photos of Opal-AN associated with Spodumene at this locality. |
| Pollucite | ⓘ2 photos of Opal-AN associated with Pollucite at this locality. |
| Lepidolite | ⓘ2 photos of Opal-AN associated with Lepidolite at this locality. |
| Almandine | ⓘ1 photo of Opal-AN associated with Almandine at this locality. |
| Elbaite | ⓘ1 photo of Opal-AN associated with Elbaite at this locality. |
| Cleavelandite | ⓘ1 photo of Opal-AN associated with Cleavelandite at this locality. |
| 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): | 5e7097fd-e1ce-420b-aed3-a028eb94bc00 |
| 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 (1.0 miles) | ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA |
| 2.3km (1.4 miles) | ⓘSimpson Quarry (Wiarda Quarry), 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 |
| 2.5km (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 |
| 5.4km (3.4 miles) | ⓘNathan Hall Quarry (Clark Hill Quarry), East Hampton (Chatham), Middlesex County, Connecticut, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Book (volume) | | Plains, wells drilled deep into this unit provide an inexhaustible supply of cold artesian, Rocky Mountain...have measured from 18’ to 27’ long. In addition, gem Garnets, Quartz crystals, Topaz and Tourmaline add...beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...tributary gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream |  | | Book (volume) | | concerned, Ohio is unique in but a single gemstone, an exceptionally high quality, colorful flint that is...jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This gem flint occurs in the...the western counties, especially the Clay Center Quarry 12 miles southeast of Toledo but in Ottawa Co....ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships |  | | Book (volume) | | concerned, Ohio is unique in but a single gemstone, an exceptionally high quality, colorful flint that is...jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This gem flint occurs in the...the western counties, especially the Clay Center Quarry 12 miles southeast of Toledo but in Ottawa Co....ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships |
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Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA