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Clinoptilolite-Ca: (Ca,Na,K)2-3Al3(Al,Si)2Si13O36·12(H2O)
Comments: Druse of colorless, clear tabular somewhat pseudohexagonal crystals of clinoptiloite-Ca in vug. Location: Fish Creek Quarry, Clackamas River, Estacada, Clackamas County, Oregon, USA. Scale: See Image. © Rruff Database