The Diamond Mines of South Africa Volume 2

The Diamond Mines of South Africa Volume 2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 edition. Excerpt: ...typified the sovereignty transferred to his vicegerent, Perdiccas. Augustus Caesar cherished his seal engraved with a sphinx as a token of his divine authority.' In the carving of cameos, precious stones with layers and veins were employed with great skill, bringing out contrasted effects, as where a face is shown in one color and the hair and dress of a figure in different colors. Sometimes certain colors were made typical. Thus Bacchus was carved in amethyst, the color of wine, while Neptune or nymphs of the sea were cut in aquamarine." Such surface polishing and engraving antedated, however, very far any grinding or faceting of the harder gems, and the intractable diamond especially, for uses of ornament. Pliny writes, "The polished hexahedral Indian diamond thins to a point."' As the crystallization of the diamond is much more 1 "A Popular Treatise on Gems," Feuchtwanger, 1867. ' " De duodecim Gemmis in Veste Aironis," Epiphanius, 1565. " Gemmarum ct Lapidum Historia," Boetius, 1647. Theophrastus--" History of Stones and Modem History of Gems," Sir john Hill, 1746. "Precious Stones and Gems," Streeter. " A Popular Treatise on Gems," Feuchrwanger, 1867. 1 " A Popular Treatise on Gems," Feuchtwanger, 1867. ' "Naturalis Historia," Caius Plinius Secundus, 23 11.0.-79 /1.0. commonly octahedral and dodecahedral than cubical, the adamas of Pliny may have been the white sapphire crystal, a hexagonal prism.' Long before the days of Sindbad the sailor," when the true diamond was unquestionably known and prized, and when the lucky adventurer filled his pockets with the choicest crystals, copper had been...
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Product details

  • Paperback | 78 pages
  • 189 x 246 x 4mm | 154g
  • United States
  • English
  • black & white illustrations
  • 1236916395
  • 9781236916396