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Trona: Na3(CO3)(HCO3)·2(H2O) Nahcolite: NaHCO3
Comments: Massive, coarse-grained Trona from a drill core of the upper mixed-layer Saltbed. White areas are nahcolite alteration. Location: Searles Lake, San Bernardino County, California, USA. Scale: 12 x 15 cm. © Dave Barthelmy