A Text-book of Precious Stones for Jewelers and the Gem-loving Public

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Putnam, 1918 - Gems - 318 pages
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Page 295 - Diamonds and other precious stones, rough or uncut, and not advanced in condition or value from their natural state by cleaving, splitting, cutting, or other process...
Page 296 - ... 20 per centum ad valorem; diamonds, coral, rubies, cameos, and other precious stones and semiprecious stones, cut but not set, and suitable for use in the manufacture of jewelry, 20 per centum ad valorem ; imitation precious stones, cut or faceted, imitation semiprecious stones, faceted...
Page 296 - ... imitation precious stones, including pearls and parts thereof, for use in the manufacture of jewelry, doublets, artificial, or so-called synthetic or reconstructed pearls and parts thereof, rubies, or other precious stones, twenty per centum ad valorem.
Page 320 - A Book of Precious Stones The Identification of Gems and Gem Minerals and an Account of Their Scientific, Commercial, Artistic, and Historical Aspects By Julius Wodiska Svo.
Page 32 - Institute,1 is to weigh the sample in air and then in water as quickly as possible, and divide the weight in air by the loss of weight in water.
Page 319 - ... and they are good and of great virtue, and they are all square and pointed of their own nature ; and some are six-square, some four-square, and some three, as nature shapes them; and, therefore, when great lords and knights go to seek honour in arms, they gladly bear the diamond upon them.
Page 146 - more like a mediaeval doctor's prescription than the making of a respectable mineral.
Page 309 - The Natural History of Precious Stones and of the Precious Metals by CW King, MA, Bell & Daldy, London, 1870, is rich in references to classical literature.
Page 181 - Consular reports occasionally mention the finding of a few scattered crystals but the rich deposits were apparently worked out during the seventeenth century and the early part of the eighteenth century.
Page 305 - By Dr. MAX BAUER, Privy Councillor, Professor in the University of Marburg. Translated from the German, with Additions, by LJ SPENCER, MA (Cantab.), FGS, Assistant in the Mineral Department of the British Museum. JUST OUT. In Large 8vo. Handsome Cloth. FIFTEENTH EDITION. Thoroughly Revised, Enlarged, and Re-cast, аи.

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