A dull, blue-black mineral, allied in composition to the sapphire, but containing a varying quantity of iron oxide; is found in large masses; is exceedingly hard, and largely used in polishing metals, plate-glass, and precious stones.
A dull, blue-black mineral, allied in composition to the sapphire, but containing a varying quantity of iron oxide; is found in large masses; is exceedingly hard, and largely used in polishing metals, plate-glass, and precious stones.
The Nuttall Encyclopædia: Being a Concise and Comprehensive Dictionary of General Knowledge[1] is a late 19th-century encyclopedia, edited by Rev. James Wood, first published in London in 1900 by Frederick Warne & Co Ltd.
WikipediaEditions were recorded for 1920, 1930, 1938 and 1956 and was still being sold in 1966. Editors included G. Elgie Christ and A. L. Hayden for 1930, Lawrence Hawkins Dawson for 1938 and C. M. Prior for 1956.[2]
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