 | | Report (volume) | | Del Norte County; Trinity River, Trinity County; Spanish Creek and Gopher Hill, Plumas County; Placerville...Dorado County; Cherokee Flats, Yankee Hill,and Oroville, Butte County; French Corral, Nevada County; Indian...Indian Gulch and Volcano, Amador County; and Alpine Creek, Tulare County. Other western localities are:...Diamond Basin, Ada County, Idaho; Curry County, Oreg.; and Nelson Hill, near Glacier County, Mont. The Great...Pierce County; Oregon, Dane County; Kohlsville, Washington County; Saukville, Ozaukee County; Eagle, |  | | Book | | this comes when one learns that such minerals as mica, apatite, sphene, zircon, fluroite and corundum...often are arrested there. At the Eldorado sapphire mine in Mon¬ tana the action of a million years is readily...Sapphires (Corundum) which combine with Biotite Mica to form R°ck ■ 1 ^ Igneous Dike Rock on the...beds are rich in such minerals as quartz, feldspar, mica, garnet, tourmaline, magnetite, zircon, gold, platinum...gneiss rocks. Schists often contain feldspar, garnet, mica and quartz. With sapphires are often found associated |  | | 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...above all, easily read and understood, GEMSTONES OF NORTH AMERICA, Volumes I and II, will be welcomed as a...abroad are becoming so scarce and expensive that North America has developed into a major exporter rather |  | | Book | | York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South...had been sending great expeditions to prospect and mine for it throughout the Sinai Peninsula since at least...and abandoned, one is also sure to find extensive mine dumps sloping steeply down from the shaft or tunnel...prodvced by atmospheric oxidation, can be found. Old mine dumps often reveal a varied assortment of brightly...unusual for a casual visitor to an old gold rush mine to kick up a solid gold, silver, or native copper |
|
Ray Mica Mine, Hurricane Mountain, Burnsville, Yancey County, North Carolina, USA