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Heulandite-Ca, Mordenite
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| Mineral: | Heulandite-Ca: (Ca,Na)2-3Al3(Al,Si)2Si13O36·12(H2O) Mordenite: (Ca,Na2,K2)Al2Si10O24·7(H2O) | |||||
| Comments: | White, acicular crystals of mordenite in heulandite geode. | |||||
| Location: | Rock Creek, Stevenson, Skamania County, Washington, USA. | |||||
| Scale: | Not Given. | |||||
| Copyright: | © Lou Perloff / Photo Atlas of Minerals | |||||
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