 | | Book (volume) | | California, is arguably the most important gem-pegmatite district in North America. Its wealth of tourmalines...rule is usually true only for special items from a region. The common minerals are not usually thus affected...specimens sell for a premium is that visitors to a region seldom arrive when the supply of minerals is being...arranged alphabetically. Some minerals are listed by group (e.g. biotite, plagioclase) while some minerals...mine is usually omitted. Instead of Consolidated Feldspar quarry, Heal Granite quarry, or Sullivan Silver |  | | Book | | Roland Bouhelier in 1973 from the "Bouhelier pegmatite", and shortly thereafter acquired by the Canadian...Organic compounds 491 Partially studied and unnamed MSH minerals 494 Gemstones 514 Pseudomorphs...an accumulated repository of partially studied (unnamed) minerals. This is likely to continue for many...and partially studied and unnamed (UK) minerals. For the unresolved unnamed minerals, all available technical...be tabulated with data for other members of the group. Drawings of idealized crystals by Laszlo Horvath |  | | Report (issue) | | Helpful suggestions on field occurrences and pegmatite mineralogy were received horn Dr. James J. Norton...Topographic maps are available for all of the Black Hills region and may be purchased from the United States Geological... [Bulletin 18 SILICATES - Tektosilicates Feldspar Group (Orthoclase) (Microcline) (Anorthoclase) (Albite)...(Clinochlore) Stilpnomelane Chloritoid Pyroxene Group (Enstatite) (Hypersthene) (Diopside) (Hedenbergite)...Cordierite - Sorosilicates Hemimorphite Amphibole Group (Cummingtonite) (Grunerite) (Tremolite) (Actinolite) |  | | Journal (issue) | | you to become a Fellow and join this important group and Wear the medallion with pride! Contact Tom...not a single mine or even a group of discrete mines but rather a region where, most commonly, crystals...elbaite crystals clustered on matrix with quartz and feldspar have emerged from Pyinygi Taung, where mining... of the British conquest in the 1880s, the Mogok region, controlled in turns by Shan and Burmese, traded...Kathé, and King Nandabayin sought to reclaim the region, preferably without further warfare. Somehow it |  | | Book | | Rare-earth minerals in the Alpine ar,d Subalpine region [Switzerland,Austria and Iti:Jy](by C. M. Gramaccioli)...Strontian crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto)...21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil 25:165-170 9 AUTHOR/TITLE...Cassedanne) 8:382-387 Amethyst from the Thunder Bay region, Ontario (by D. G. Ellion) 13:67-70 New data on...23:209-225. 23:228 Al 'JAJ\ABO~OINA The Anjanabonoina pegmatite. Madagascar (by W. E. Wilson) 20:191-200 A.'\ |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...massive calcite. or, rarely, still attached to the feldspar/mica walls of the dike (www.davidkjoyceminerals...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during...about 20 other quartz mines are operated in the region of the Subpolar Urals, northwest of Saranpaul, |
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