Handbook and Descriptive Catalogue of the Collections of Gems and Precious Stones in the United States National Museum

Handbook and Descriptive Catalogue of the Collections of Gems and Precious Stones in the United States National Museum

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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. 1922 edition. Excerpt: ...found was 9 inches long. The locality affords all of the colored varieties, achroite, indicolite, and rubellite. Ked and green tourmalines are found at Chesterfield, Massachusetts, in a granite vein with albite, uraninite, and pyrochlore, the crystals small and curved, nearly opaque, and fragile; green crystals, often with distinct prisms of red color inside, are found at this locality. At Goshen, Massachusetts, similar varieties occur, and the blue is met with in great perfection. At Haddam, Connecticut, in crystals in mica-slate with anthophyllite, also in granite with iolite, and also at the gneiss quarries, on the east side of the river. At Haddam Neck, in fine green, and parti-colored crystals affording magnificent gems. Near Gouverneur, New York, light and dark brown crystals, often highly modified. Good crystals are found in Chester County, Pennsylvania. The most noted American locality for the pink and variegated tourmaline is the Mesa Grande region in San Diego County, southern California. The mineral occurs here also in pegmatitic rocks associated with the variety of spodumene commercially known as kunzite. and occasional gem minerals of other varieties. A very complete and systematic series of these pegmatites from both the Appalachian regions and California, with their associated minerals, is to be found among the rock collections in the geological hall on the first floor of the Museum. (See also pp. 136-139.) In Canada magnificent green-yellow crystals occur in the limestone at Great Calumet Island; amber-colored ones at Fitzroy, Ontario; transparent brown at Hunterstown, Quebec; black at Bathurst and Elmsley, Ontario, and St. Jerome, Quebec. Small brilliant crystals of the black variety are found in decomposed feldspar, at...show more

Product details

  • Paperback | 96 pages
  • 189 x 246 x 5mm | 186g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123656832X
  • 9781236568328