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| HEULANDITE | (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O |
| Locality: Rt. 101, Rt. 101A road cut, Amherst, NH | |
| Specimen Size: 2.3 mm crystal with Babingtonite, black | |
| Environment: Zeolite vein in Gneiss | |
| Field collected: Tom Mortimer | |
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