 | | Book | | are those of the gold mines in the Witwatersrand region, near Johannesburg in South Mrica, which descend...discovery of the placer deposits in the Sacramento Valley in California led to the famous gold rush in 1849...1849, as did the discoveries in the Klondike region, Yukon River, Alaska. Only 2 years later, in 1851...films copper transmits green light. The major occurrences of native copper are copper-rich ores, especially...especially those of bornite, which formed in the region between the oxidation and reduction zones, e. g., |  | | Journal (issue) | | Museum Toronto, Ontario Steven R. Morehead Green Valley, AZ Donald R. Peacor University of Michigan Ann...Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Jeffrey A. Scovil Phoenix, AZ Harold and Erica... . . . . . . . . 275 by A. R. Kampf Zeolite occurrences in the Central Metasedimentary Belt of the Grenville...Record, volume 37, July–August, 2006 Zeolite Occurrences in the Central Metasedimentary Belt of the Grenville...modified from Price and Douglas (1972) and Peck and Valley (2000). staff in 1983. Over the next decade, approximately |  | | Journal (issue) | | crystals upon quartz, from the Säo Jose da Safira region. Sample is 130 mm long. Occasionally contrasting...freely transmitted except for a faint absorption region near 560 nm. There is a fairly strong and narrow...tourmalines show a broad absorption in the green region centred about 525 nm accompanied by a narrow band...tourmaline deposits in Minas Gérais. In some occurrences the mica plates appear as if they were plastered...Suaçuî to the southwest (Figure 18). The whole region belongs to the 'Oriental pegmatitic province' of |  | | Book (edition) | | penny, some feldspar, a quartz crystal, and some topaz handy, you should be able to identify most minerals...chert, chalcedony, and jasper; streak plate Garnet Topaz Corundum Diamond Be a Safe and Considerate Collector...diorite. The New England states, the Rocky Mountain region, Arizona, California, and Washington are all good...quartz. Other minerals include quartz, tourmaline, topaz, mica, apatite, lepidolite, and monazite. There...sought for large crystals of quartz, smoky quartz, topaz, and other prizes. Famous pegmatite belts and outcrops |  | | Book | | MB/ are a series of maps to give the mineral occurrences both a spatial and geological context, and some...reflection ofnot only the varied geology of the region but also a once-thriving minerals industry and..."British" species. A further 11 British first occurrences have since been recorded from specimens held...species to his increasing list of British first occurrences. What went unnoticed at the time was that the... so that the context of many of the mineral occurrences can be better understood. The accompanying figures |  | | Journal (issue) | | Medenbach Bochum, Germany Eric Offermann Arlesheim, Switzerland photomicrography Julius Weber Mamaroneck, New...one gemstone. Superb and abundant sherry-brown topaz crystals and brilliant red beryl are the best known...Englemann probably made the first discovery of topaz in the area during an expedition in 1859 (Englemann...western Utah that produces these minerals. Similar occurrences have been known for many years in the Dugway...semi-arid climate and high elevation (1398-meter valley floors and 2128-meter mountain tops) gives the |  | | Book | | Smale. Photograph taken by Jeff Scovil. Imperial topaz (130 x 35 mm), Antonio Pereira, Ouro Preto, Minas...319 Rhodochrosite 320 Azurite 321 Malachite 324 Aragonite 326 The sulfate class 327 Gypsum and anhydrite...375 The idiomorphic topaz 377 The superb beauty of the topaz 385 T he imperial topaz of Ouro Preto 393...393 The Mine of Capao do Lana 397 The imperial topaz of Antonio Pereira 398 The magical all ure of the cuclase...Neoproterozoic and associated granites: beryl, tourmaline, topaz, garnet, ap:1tite and other phosphates, quartz, |  | Van Alstine, R. E., Worl, R.G., Heyl, A.V., Trace, R.D., Parker, R.L., Griffitts, W.R., Sainsbury, C.L., Cathcart, J.B. (1976) Geology and resources of fluorine in the United States. Professional Paper 933. US Geological Survey doi:10.3133/pp933 | Report (issue) | | deposits and occurrences.......................... Fluorine in topaz deposits and occurrences.............and districts and important types of fluorine occurrences................................ Alaska, by C...and districts and important types of fluorine occurrences-Continued Colorado-New Mexico-western Texas-southeastern....... 10. Locations of major topaz deposits, topaz occurrences, and topaz-bearing rhyolites in the United...26. Map showing major structural features in the region surrounding the Illinois-Kentucky fluorspar district |  | | Journal (issue) | | Museum Toronto, Ontario Steven R. Morehead Green Valley, AZ Donald R. Peacor University of Michigan Ann...Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Jeffrey A. Scovil Phoenix, AZ Harold and Erica...FLUORITE on muscovite, 14 cm, from Nagar, Hunza Valley, Northern Areas, Pakistan. Wally Mann collection;...10/#5 Thomas & Wah Wah Ranges (Utah) (famous for Topaz, Red Beryl. etc) $12 v.11/#1 Toxic Minerals Barite...Issue! The only complete review of these famous occurrences $12 v.23/#5 Matlock (Eng.), Prenteg (Wales) |  | | Journal (issue) | | Museum Toronto, Ontario Steven R. Morehead Green Valley, AZ Donald R. Peacor University of Michigan Ann...Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Jeffrey A. Scovil Phoenix, AZ Harold and Erica...secondary uranium minerals (especially from the Shaba region of the Democratic Republic of Congo). The scope...specimens on display here, from a huge imperial topaz weighing more than 2,000 carats to a 6.8-cm phosphophyllite...well maintained trail system in the Vindicator Valley, just north of Victor. The trail provides access |  | | Book (volume) | | Hallelujah Junction, Nevada; blue, cushion cut topaz (25.30 ct), Ramona, California; brownish yellow...various places, especially in regard to diamond occurrences which promise to make the North American continent...certain other areas, as around the Great Lakes region. Numerous small discoveries of gem materials took...C. & Barbara T. Smith, Four Clover Mine, Castro Valley, CA; Lita R. Smith-Gharet, Steel Eagle, Tigard...Alvin A. Youngquist, Bergsten Jade Co., Castro Valley, CA; June Culp Zeitner, Rapid City, SD. [also wish | | | Book (volume) | | Hallelujah Junction, Nevada; blue, cushion cut topaz (25 .30 et), Ra1nona, Caufornia; brownish yellow...various places, especially in regard to diamond occurrences which pro1nise to make the North American continent...certain other areas, as around the Great Lakes region. Numerous s1nall discoveries of gem materials took...C. & Barbara T. Smith, Four Clover Mine, Castro Valley, CA; Lita R. Smitl1-Gharet, Steel Eagle, Tigard...Alvin A. Youngquist, Bergsten Jade Co., Castro Valley, CA; June Culp Zeitner, Rapid City, SD. I also |  | | Journal (issue) | | .....................785 by W. E. Wilson Black topaz from the Thomas Range, Juab County, Utah ......... High in the mountain ranges of the Shigar Valley region of Pakistan, hundreds of mine tunnels pierce...Afghani and Pakistani minerals. He traveled to that region for minerals in the early 1970s (around the time...Freilich aquamarine, 13 cm, from Dassu, Shigar Valley, Pakistan. Now in a private collection; James Elliott...Sainte-Marie-auxMines Show in the amazing Alsace region of France. Marco is a bit of a genius: he is one |  | | Book | | 2016936575 © Springer International Publishing Switzerland 2016 This work is subject to copyright. All rights...company is Springer International Publishing AG Switzerland Preface This book is the first assembly of...the setting and origin of major deposits in the region, together with information on tonnages and grades...(7) banded iron formation (BIF), (8) Mississippi Valley-type (MVT) zinc-lead, (9) sediment-hosted stratiform...comparisons and contrasts with MVT deposits in the region. The last part is focused on sediment-hosted iron |
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