| Locality type: | Quarry |
| Classification |
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| Species: | 'Pumpellyite Subgroup' (not an IMA approved species) |
| Formula: | Ca2XAl2[Si2O6(OH)][SiO4](OH)2A |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Pumpellyite Subgroup data |
| Locality Data: | Click here to view Mount Tom Quarry, Mount Tom, Holyoke, Hampden County, Massachusetts, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 677018 |
| Long-form Identifier: | 1:3:677018:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Pumpellyite Subgroup |
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| 35.2km (21.9 miles) | ⓘState Route 20 road cut, East Granby, Hartford County, Connecticut, USA |
| 36.1km (22.5 miles) | ⓘRoncari Quarry, East Granby, Hartford County, Connecticut, USA |
| 60.0km (37.3 miles) | ⓘBalf Quarry, Newington, Hartford County, Connecticut, USA |
| 60.7km (37.7 miles) | ⓘState Route 4 road cut, Farmington, Hartford County, Connecticut, USA |
| 70.2km (43.6 miles) | ⓘHart's Lead Mine, Berlin, Hartford County, Connecticut, USA |
| 85.4km (53.1 miles) | ⓘCheshire Traprock Quarry, Cheshire, New Haven County, Connecticut, USA |
| 85.8km (53.3 miles) | ⓘInterstate Route 495/State Route 62 interchange (I-495 exit #26), Berlin, Worcester County, Massachusetts, USA |
| 86.6km (53.8 miles) | ⓘInterstate 290/Interstate 495 interchange road cuts, Marlborough, Middlesex County, Massachusetts, USA |
| 87.2km (54.2 miles) | ⓘState Route 9 and State Route 81 Interchange, Higganum, Haddam, Middlesex County, Connecticut, USA |
| 87.7km (54.5 miles) | ⓘReed's Gap Quarry (New Haven Trap Rock quarry; Tilcon Durham quarry), Durham, Middlesex County, Connecticut, USA |
| References |
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