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Laumontite: CaAl2Si4O12·4(H2O)
Comments: Diamond-shaped prism of laumontite with chrysocolla. Location: Azurite mine, Pinal County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Comments: White, well developed laumontite crystals up to 1 cm. on matrix. Location: Osilo, Sardegna, Italy. Scale: Specimen size 6 x 4.5 cm. © Sandro Maggia/Minernet.it