 | | Journal (article/letter/editorial) | | from Canada Downloaded by [Florida International University] at 19:52 23 August 2013 C anada is home...from emerald to sapphire, Canada has it all. Yet, for most of its history, Canada has been regarded as a...species have been found at one time or another in Canada (fig. 1). Some gem localities, such as those for...aquamarine in British Columbia are but a few examples. Direct exploration for colored gemstones by mining companies...S. WILSON PO Box 352 Kingston, Ontario K7L 4W2 Canada brad@alpinegems.ca 96*2: 405,9(3: The |  | | Journal (issue) | | Switzerland A. A. Levinson Calgary, Alberta, Canada James E. Shigley Carlsbad, California C. S. Hurlbut...F. C. Hawthorne at the University of Manitoba, Canada, performed electron microprobe analyses on (1)...six sections each. As shown in figure 3, this division changes a four-sided tetrahedron to a 24-sided...diamonds from the Ekati mine, Northwest Territories, Canada. Faceted diamonds from Canada’s first diamond mine...had been cut by Sirius Diamonds, Vancouver, British Columbia, which is one of the first companies to manufacture |  | | Journal (issue) | | nephrite jade in Europe. Shortly after discovery, mining operations commenced and a substantial quantity...jade was produced (Traube, 1885). Subsequently mining operations were disrupted throughout the First...of recrystallization was probably rapid. 451 Mining and processing Extraction of nephrite jade from...essentially carried out in conjunction with serpentinite mining. Once the individual nephrite jade bodies were...Europe. Volume 3: Central Europe. The Institution of Mining and Metallurgy and the Mineralogical Society, London |  | | Journal (issue) | | Switzerland A. A. Levinson Calgary, Alberta, Canada Christopher P. Smith Lucerne, Switzerland C....snapshot of a decade—and a profound one at that—from mining and localities to treatments and synthetics to...of Sakha), with exciting discoveries in northern Canada. Cultured pearls from French Polynesia, Australia...Nigeria and Brazil. Diamond was mined in northern Canada for the first time. Names such as Tunduru, Ilakaka...are directly involved with gem mining or who purchase gem rough at mining sites 3. The authors’ knowledge |  | | Journal (issue) | | the supply chain. The development of large-scale mining operations for colored gems has been in the news...of the decade forced major cutbacks in diamond mining and prompted industry banks to re-evaluate long-accepted...still have not fully played out. Colored stone mining and cultured pearl farming also experienced severe...before the economic crisis forced major changes in mining operations, the DTC’s share of the rough market...initiatives. The BEE laws required all diamond mining companies, including De Beers, to have a minimum |
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