 | | Report (issue) | | Mica and Beryl Pegmatites in Idaho and Montana GEOLOGICAL SURVEY PROFESSIONAL PAPER 229 Mica and...and Beryl Pegmatites in Idaho and Montana By W. C. STOLL GEOLOGICAL .A descrz"ption SURVEY of mines...of mica and beryL ______________________ .:. Mining, preparation, and uses of mica and beryL _____ :.._...Production and reserves ________________________ _ Adams County ________________________________ _ Clarkprospe...Mica deposits ___________ - _____________ _ Boise County ______________ - _---- _______ - _____ _ Mica Slim |  | | Journal (issue) | | pits one meter deep, and sunk in coarse yellow-brown sand overlying a bed of clay. The rubies occurred...platelets of apatite, (Cas(P04)3 (OH,F,Cl);and reddish brown almandite garnets, Fe3Alz(Si04)3. These inclusions...light (right). Stone courtesy of the Los Angeles County Museum of Natural History. Photo b y Tino Hammid...light (right). Stone courtesy of the Los Angeles County Museum of Natural History. Photo by Tino Hammid...yellow-orange crystals of monazite from Montgomery County, North Carolina, appeared reddish orange under |
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