Judd, J. W., Hidden, W. C, and Pratt, J. H. On a new mode of occurrence of ruby in North Carolina: Am. Jour. Sci., 4th ser., vol. 8, 1899, pp. 370-381.
Kunz, George F. Jewelers' materials and ornamental stones of California: California State Min. Bureau, Bull. 37, 1905.
--------- Precious stones: Mineral Resources U. S. for 1882 to 1905, U. S. Geol.
Survey, 1882-1905.
--------- A new lilac-colored spodumene from Pala, California: Am. Jour. Sci., 4th
ser., vol. 16, 1903, pp. 264-267.
---------and Baskerville, Charles. The action of radium, actinium, Roentgen rays,
and ultra-violet light on minerals and gems: Science, new ser., vol. 18, No. 468, 1903, pp. 769-783.
--------- Sapphires in Montana: Am. Jour. Sci., 4th ser., vol. 4, 1897, pp. 417-420.
Pirsson, L. V. Corundum-bearing rock from Yogo Gulch, Montana: Am. Jour.
Sci., 4th ser., vol. 4, 1897, pp. 421-423. Pratt, Joseph Hyde. Crystallography of the Montana sapphires: Am. Jour. Sci.,
4th ser., vol. 4, 1897, pp. 424-428. Pratt, J. H., and Hidden, YV. E. On rhodolite, a new variety of garnet: Am. Jour.
Sci., 4th ser., vol. 5, 1898, pp. 294-296.
--------- On associated minerals of rhodolite: Am. Jour. Sci., 4th ser., vol. 6, 1898,
pp. 463-468.
Schaller, Waldemar T. Tourmaline localities of southern California: Science, new ser., No. 476, February 12, 1904, pp. 266-268.
--------- Spodumene from San Diego County, California: Publ. Univ. California, vol.
. 3, No. 13, September, 1903.
Silliman, Benjamin. Turquoise of New Mexico: Am. Jour. Sci., 3d ser., vol. 22,
1881, pp. 67-71. Smith, J. Lawrence, Hiddenite. an emerald green variety of spodumene: Am. Jour.
Sci., 3d ser., vol. 21, 1881, p. 128. Sterrett, Douglas B. Tourmaline from San Diego County, California: Am. Jour.
Sci., 4th ser., vol. 17, 1904, pp. 459-465. Turner, H. W. Diamonds in California: Am. Geol., vol. 23, 1899, pp. 182-191. Waring, G. A. The pegmatite veins of Pala, San Diego County, California: Am.
Geologist, June, 1905; pp. 356-369.
TEXT AND REFERENCE BOOKS.
Bauer, Max. Precious stones; trans, by L. J. Spencer, C. Griffin & Co., London,
J. B. Lippincott Co. agents, Philadelphia. Castellani, Augusto. Gems; trans, by Mrs. John Brogden, 1871; Bell & Daldy,
London. Claremont, Leopold. The gem cutter's craft, 1906; George Bell & Sons, London. Emanuel, H. Diamonds and other precious stones, 1867; J. C Hotten, London. Farrington, Oliver Cummings. Gems and gem minerals, 1903; A. YV. Mumford,
Chicago. King, C. W. The natural history of precious stones and gems; 1865, Bell & Daldy,
London. Kunz, George F. Gems and precious stones of North America, 1890; Scientific Pub.
Company, New York. Streeter, Edwin W. Precious stones and gems, 1898; George Bell & Sons, London. Tassin, Wirt. Catalogue of gems in the United States National Museum: Ann.
Rept. U. S. Nat. Mus., 1900, pp. 476-670. Complete bibliography. YVilliams, Gardner F. The diamond mines of South Africa, 1905; Macmillan Co.,
New York.
PEARLS.
Kunz, George F.
Pearls, utilization and application of the shells they are found in, as
shown at YVorld's Columbian Exposition: United States Fish Com. Bull,
for 1893, pp. 439-457.
--------- Fresh-water pearls and pearl fisheries of the United States: United States
Fish Com. Bull, for 1897, pp. 373-426.
Simpson, Charles T. Pearly fresh-water mussels of the United States: United
States Fish Com. Bull, for 1898, pp. 279-288. Smith, Hugh M. Pearl-button industry and mussel fishery of the Mississippi River:
United States Fish Com. Bull, for 1898, pp. 289-314. Townsend, Charles H. Report upon the pearl fishery of the Gulf of California:
United States Fish Com. Bull, for 1899, pp. 81-98.
