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Dachiardite-Ca: (Ca,Na2,K2)5Al10Si38O96·25(H2O)
Comments: Milky bladed aggregates of dachiardite-Ca with mordenite-Na in cavities in basalt. Location: Cape Lookout Quarry, Tillamook Co., Oregon, USA. Scale: Specimen Size 2.5x4 cm. © Diederik Visser