| Locality type: | Mine |
| Classification |
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| Species: | 'Plagioclase' (not an IMA approved species) |
| Formula: | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Plagioclase data |
| Locality Data: | Click here to view Forge Hill iron mines (Old Hawley iron mines), West Hawley, Hawley, Franklin County, Massachusetts, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 29991 |
| Long-form Identifier: | 1:3:29991:4 |
| GUID (UUID V4): | b342f660-61c8-4e57-b529-16e9e6bd0769 |
| Nearest other occurrences of Plagioclase |
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| 4.0km (2.5 miles) | ⓘHawks Pyrite Mine (Mount Peak Mine), Charlemont, Franklin County, Massachusetts, USA |
| 11.6km (7.2 miles) | ⓘBetts Manganese Mines (Anson Betts Mine; Plainfield Manganese Mines; Taconic Manganese Mines), Plainfield, Hampshire County, Massachusetts, USA |
| 11.7km (7.3 miles) | ⓘMassachusetts Talc Company Mine, Rowe, Franklin County, Massachusetts, USA |
| 12.3km (7.7 miles) | ⓘFoliated Talc Company Mine, Rowe, Franklin County, Massachusetts, USA |
| 56.0km (34.8 miles) | ⓘRichmond, Cheshire County, New Hampshire, USA |
| 71.7km (44.6 miles) | ⓘKirk No. 1 Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 72.1km (44.8 miles) | ⓘWhite Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 72.6km (45.1 miles) | ⓘMonadnock Mountain, Jaffrey, Cheshire County, New Hampshire, USA |
| 73.2km (45.5 miles) | ⓘKirk No. 2 Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| 73.9km (45.9 miles) | ⓘNichols Quarry, Gilsum, Cheshire County, New Hampshire, USA |
| References |
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