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Caysichite-(Y): Y2(Ca,Gd)2Si4O10(CO3)3(H2O,O,OH)·3H20
Comments: Brownish inclusions of caysichite-(Y) with white tengerite-(Y) rims. Location: Mt. Ploskaja, Keivi, Kola, Russia. Scale: Sample Size 2.5x3 cm. © Diederik Visser