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Pringleite: Ca9B26O34(OH)24Cl4·13(H2O)
Comments: SEM back-scatter photomicrograph of a polished thick section containing pringleite (Pr), hilgardite-lA (Hi) and halite (Hal). (CanMin, v31:795). Location: Potash Company of America mine at Penobsquis, near Sussex, New Brunswick, Canada. Scale: Picture Size 2 mm. © Canadian Mineralogist