  
North Carolina contains rocks ranging in age from the ancient Precambrian to the youngest Pleistocene and Recent formations. These rocks contain one of the largest assemblages of minerals identified to date in any state in the Union. Some of these minerals are prized as semi-precious and precious gem stones, while others are cabinet specimens and valuable ores.
By James F. Conley, 1958; revised 1971 by O.F. Patterson, III and G. Robert Ganis. 128 pages.
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