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Dresserite: BaAl2(CO3)2(OH)4·(H2O)
Comments: White divergent sprays of fibrous crystals dresserite crystals. Location: Francon quarry, Montréal, Jacques Cartier Co., Québec, Canada. Scale: Crystal size 5mm. © Tom Loomis / Dakota Matrix
Comments: Radiating spheres of dresserite on matrix. Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species