 | | Book (volume) | | NORTInHIwo AME A Volumes John Sinkankas _ GEMSTONES OF NORTH AMERICA In Two Volumes ® Volume I Gemstones, of...of all the mineral treasures to be found in North America, are perhaps the most fascinating—and the...worthy of the name. Some, like the emeralds of North Carolina, the colorful and fabulous tourmalines and...review of deposits, a helpful geographical index, and an exceptionally complete listing of books and arucles...above all, easily read and understood, GEMSTONES OF NORTH AMERICA, Volumes I and II, will be welcomed as a |  | | Book | | (subspecies) of quartz; all of like importance; therefore, an equal amount of are not space should not be devoted...subvarieties of amorphous quartz, including the part on opal; Mr. Dake's many years of experience as editor of...XII Unusual Quartz Types 225 Chapter XlII The Opal 239 Chapter SiLICIFICATION AND XIV PeTRIFIED...118 Sand Crystals Arrowheads of Common 119 Opal and Agate Display of Quartz Minerals Jasper Jasper...Interior 218 Nodule—-Moss-agate Type 220 Agate- and Opal-filled Nodule 222 Agate-filled Nodule 224 Coral |
|
