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Natrolite: Na2[Al2Si3O10]·2(H2O) Eudialyte: Na4(Ca,Ce)2(Fe++,Mn,Y)ZrSi8O22(OH,Cl)2 (?)
Comments: Druse of gemmy, red eudialyte crystals to 1 mm on white natrolite. Location: Mt. St. Hilaire, Quebec, Canada. Scale: Picture size 1.5 cm. © John Veevaert
Natrolite: Na2[Al2Si3O10]·2(H2O)
Comments: Transparent prismatic crystals of natrolite. Location: Usti (Aussig), Bohemia, Czech Republic. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Natrolite: Na2[Al2Si3O10]·2(H2O) Neptunite: KNa2Li(Fe++,Mn)2Ti2Si8O24
Comments: Jet-black square prisms of neptunite etched out of the enclosing white natrolite with minor benitoite. Location: Benitoite Gem Mine. San Benito Co. California, USA. Scale: 6.5 x 6 cm. © Fabre Minerals
Natrolite: Na2[Al2Si3O10]·2(H2O) Serandite: Na(Mn++,Ca)2Si3O8(OH) Analcime: NaAlSi2O6·(H2O)
Comments: Orange-red, blocky serandite with white, blocky natrolite and white, equant grains of analcime. Location: Mt. St. Hilaire, Canada. Scale: 4 x 3 cm. © Fabre Minerals