Gems, Jewelers' Materials, and Ornamental Stones of California

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W. W. Shannon, Superintendent State Printing, 1905 - Precious stones - 171 pages
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Page 164 - TOTAL MINERAL PRODUCT OF CALIFORNIA FOR 1903. The following table shows the yield and value of mineral substances of California for 1903, as per returns received at the State Mining Bureau, San Francisco, in answer to inquiries sent to producers : Quantity. Value. Asphalt
Page 35 - essential to gems, if they are to receive and retain a high degree of polish and stand long use. Hardness is not the same as toughness. The diamond is very hard, but not tough—in fact, it is very brittle, easily broken by a blow. Scale of Hardness. 1. Talc (lowest). 6. Orthoclase. 2. Gypsum. 7. Quartz. 3. Calcite. 8. Topaz. 4. Fluorite. 9. Corundum. 5.
Page 165 - and to dispose of to the public, at such price, any and all publications of the Bureau, including reports, bulletins, maps, registers, «tc. The sum derived from such disposition must be accounted for and
Page 162 - scientific papers, and magazines; mining publications: and the current literature of mining ever needed in a reference library. Manufacturers' catalogues of mining and milling machinery by California firms are kept on file. The Registers of Mines form an up-to-date directory for investor and manufacturer.
Page 162 - the maps up to date. The seeker after information inquires here if he wishes to know about the geology or topography of any district; about the locations of the new camps, or positions of old or abandoned
Page 21 - from almost micrograins to crystals 4 inches in diameter. They are most plentiful in the feldspar, but are found in other portions of the vein, sometimes in pockets and sometimes isolated. The larger crystals generally have a green exterior and are red or pink in the center. Some of the crystals contain
Page 162 - THE LIBRARY. This is the mining reference library of the State, constantly consulted by mining men, and contains between 4000 and 5000 volumes of selected works, in addition to the numerous publications of the Bureau itself. On its shelves will be found reports on geology, mineralogy, mining, etc., published by states, governments, and individuals; the reports of scientific societies at home and abroad:
Page 109 - in the whole region. These are very varied, conspicuous, and peculiar, while elsewhere they are very rare. Some are recognizable as "Aztec water signs," pointing the way to springs; but most of them are unlike any others known, and furnish a most interesting problem to American archaeologists. They are numbered
Page 108 - extend for many miles in all directions, and appear as long, low ridges, separated by valleys and canons of the wildest character. Among these basaltic rocks and in the valleys are found smaller areas of low, rounded hills of decomposed sandstones and porphyries, traversed at times by ledges of harder crystalline rocks, quartzites,
Page 109 - high. One curious legend still exists among the neighboring Indians that is in no way improbable or inconsistent with the facts. The story was told Mr. Eisen by "Indian Johnny," son of the Piute chief, Tecopah, who died recently at a great age, and who in turn had received it from

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