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Tengerite-(Y): Y2(CO3)3·2-3(H2O)
Comments: Pearly white platy tengerite-(Y) crystals in radial sprays to 2mm and fine layers on matrix. Partially replaced by an unidentified green mineral with bright blue centers that is probable decrespignyite-(Y). Location: Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia. Scale: Overall: 4.5 x 1 x 4 cm. © Tom Loomis / Dakota Matrix
Comments: White microcrystalline tengerite-(Y) seams on matrix. Location: Evans-Lou Quarry, Quebec, Canada. Scale: Specimen Size 2x3 cm. © Diederik Visser