Danas Manual of Mineralogy for the Student of Elementary Mineralogy the Mining
The book Danas Manual of Mineralogy for the Student of Elementary Mineralogy the Mining was written by author James Dwight Dana Here you can read free online of Danas Manual of Mineralogy for the Student of Elementary Mineralogy the Mining book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Danas Manual of Mineralogy for the Student of Elementary Mineralogy the Mining a good or bad book?
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Transparent to subtranslucent. Frequently the larger, coarser BERYL 241 crystals show a mottled appearance due to the alternation of clear transparent spots with cloudy, almost opaque portions. Tests. B. B. Whitens and fuses with difficulty at 5-5. 5 to an enamel. Yields a little water on intense ignition. Insoluble in acids. Recognized usually by its hexagonal crystals, its hard- ness, color, etc. Varieties. Ordinary Beryl. In coarse translucent to opaque crystals or masses, usually of a pale ...greenish blue or yellow color. Sometimes in very large crystals; one from Graf ton, New Hamp- shire, measured over 4 feet in length with a diameter between 20 and 30 inches, weight 2900 pounds. Aquamarine. Name given to the pale greenish blue trans- parent stone. Used as a gem. Golden Beryl. A deep golden yellow variety, which, when clear, is used as a gem. Rose Beryl. A variety varying in color from pale pink to deep rose. Beautiful gem material from Madagascar has been named morganite. Emerald.
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