"Diamantiferous" Quotes from Famous Books
 ... soil was red, and of a sandy nature. The next stratum was of a loose, yellow, gravelly lime, and the third blue, of a hard, slaty nature. This last was the real diamantiferous soil. Large stones had been found in the "yellow," but the working of this generally did not pay. Kimberley mine, however, had paid very well all through. The method of working in deep ground was determined by roadways running ...
— Scientific American Supplement, No. 392, July 7, 1883 • Various |
