 | | Journal (article/letter/editorial) | | TOPAZ A • MINERALOGICAL • REVIEW Downloaded by [New York University] at 21:04 11 May 2015 Coveted...specimens from the National Museum of Natural History TOPAZ IS THE STATE GEM of Texas and Utah; however, it...the "big three" (emerald, sapphire, and ruby), topaz is nevertheless regarded as an important and prized...attributes is that, unlike many other gem minerals, topaz may occur in crystals large enough to cut giant...giant gemstones. Gems such as the Champagne Topaz (36,853 carats), the American Golden (22,875 carats), and |  | | 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 |  | | Journal (issue) | | names too, those now long since lost.) Although the region may have had a short history of working, the endeavors...amethyst. Despite the demand for specimens, the region is remote and the landscape challenging. Over time...It exhibits all the most desired traits from the region, all in one specimen—a culmination of perfection...situated on the northern seacoast of the Asturias region of Spain. Figure 2. The Caravia-Berbes District...existence of fluorite in 18 the Berbes-Caravia region was made by Guillermo Schultz (1836), who observed |  | | 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 |  | | 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 |  | | Report (Issue volume) | | in the background VOLUME 1 GEOLOGY, MINERAL OCCURRENCES, EXPLORATION AND GEOCHEMISTRY R.E. Brown, H...and mineral occurrences of the Rivertree silver field Map 3 - Mines and mineral occurrences of the Boonoo...and mineral occurrences of the Boorook area. Map 5 - Geology, mines and mineral occurrences of the Wilsons...Downfall area. Map 6 - Geology, mines and mineral occurrences of the Mount Carrington area. Map 7 – Geology...framework for the more than 650 mineral deposits and occurrences which occur in the subject area. The basement |  | | Book | | Smale. Photograph taken by Jeff Scovil. Imperial topaz (130 x 35 mm), Antonio Pereira, Ouro Preto, Minas...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,...garnets, quartz, feldspars, pyroxenes, cassiterite, topaz, wolframite, scheelite, copper, lead and zinc minerals |  | | Journal (volume) | | Resources of the Chibougamou Abstract Mineral Region, Accidents Accidents 1911, of 115-119.* 76-81... Moore, Corpressors Brock, R. W., on Tin and Topaz In Heavy Duty, for Small, 62.* Alberta, General...Future Development, 449- Coal Mining in Nicola Valley and Similka- meen 458. Districts, B.C., 46...W. Huntoon, 573. 574. 610. 811. Chibougamou Region, Abstract of Prelimerals, 269. inarv Report on...Alloys, The, 793. Geology of The Lake Superior Region, Clark, H. H., on Electrical Accidents In Mines: |
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