| Locality type: | Quarry |
| Classification |
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| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Comments: | Cacholong variety. |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view McDowell's Quarry (Osborne and Marsellis Quarry), Upper Montclair, Montclair, Essex County, New Jersey, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 73231 |
| Long-form Identifier: | 1:3:73231:2 |
| GUID (UUID V4): | 4fd5c486-370f-4d99-9684-e4686c1f6c21 |
| Nearest other occurrences of Opal |
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| 3.0km (1.8 miles) | ⓘFrancisco Brothers Quarry, Great Notch, Little Falls Township, Passaic County, New Jersey, USA |
| 3.6km (2.3 miles) | ⓘF.J. Marley Quarry, Verona, Essex County, New Jersey, USA |
| 7.1km (4.4 miles) | ⓘUpper New Street Quarry, Paterson, Passaic County, New Jersey, USA |
| 17.9km (11.1 miles) | ⓘPennsylvania Railroad cut, Mt Pleasant, Bergen Hill, Jersey City, Hudson County, New Jersey, USA |
| 18.7km (11.6 miles) | ⓘNew York - West Shore & Buffalo RR tunnel, Weehawken, Bergen Hill, Hudson County, New Jersey, USA |
| 21.9km (13.6 miles) | ⓘ106th Street & Central Park West, Manhattan (New York County), New York City, New York, USA |
| 30.2km (18.8 miles) | ⓘAllen Mine, Rockaway Township, Morris County, New Jersey, USA |
| 31.4km (19.5 miles) | ⓘStirling Brook ("Carnelian Creek"), Warren Township, Somerset County, New Jersey, USA |
| 32.9km (20.5 miles) | ⓘMillington Quarry, Bernards Township, Somerset County, New Jersey, USA |
| 33.2km (20.7 miles) | ⓘDickerson Mine, Mine Hill, Morris County, New Jersey, USA |
| References |
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