During a field study of the boron deposits of California and Nevada in 1929 there was found in the colemanite district of Borate, in the Calico Hills, San Bernardino County, California, a small deposit of sulfates of iron. This deposit was found to contain a fair abundance of a new sulfate of iron and potash not previously described. Earlier, in 1926, there was collected from the dumps of the Santa Maria mine, at Velardena, Durango, Mexico, a small amount of similar material which proves to be the same mineral. For this new mineral species the writer proposes the name krausite, in honor of Doctor Edward Henry Kraus, professor of crystallography and mineralogy and director of the Mineralogical Laboratory, University of Michigan.

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