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for North Carolina--Minerals
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Completed in 1934 and opened on 1 January 1935, the bromine plant, located in Kure Beach, was the first and only of its kind. Bromine, a natural, non-metallic element known to reduce engine \"knock\" when added to gasoline, was harvested from local waters for eleven years before the plant closed, shifting operations to Texas.
Topaz, an aluminum fluosilicate that crystallizes in the orthorhombic system and rates as an 8 on the Mohs scale, has been found in North Carolina. The Mineral Resources Division of the N.C. Department of Conservation and Development has noted the most extensive occurrence of Topaz in the state to exist on Bowlings Mountain.