 | | Book | | Cover: Turquoise set in Silver superimposed on Sphalerite Back Cover: Emerald and Diamond Ring Title Page:...of cut gems. Gems pass through many hands between mine and marketplace In many parts of the world gem crystals...emeralds they can actually indicate the specific mine from which a crystal came. Many of the properties...alluvial), Guyana, Borneo, and Australia. A diamond mine at Murfreesboro, Arkansas has yielded many small...discovered at the Premier Mine in South Africa. Named the Cullinan Diamond after the mine owner, it-weighed 3 |  | | Journal (issue) | | NE of the Sandawana mine, along the Mweza Range, which is named 'Machingwe' mine, after a nearby stream...The Machingwe Emerald mine The car journey from Masvingo to the Mashingwe mine takes about 3l/z hours...for the mine became 'Machingwe Syndicate No. No.22 Mine', but is better known under the name Mine: Machingwe...Machingwe mine. At the time of the first author's visit to the mine -S striking, the No. No.11 shaft shaft...mining based on very simple methods at the time the mine was visited, but also the plant and the treatment |  | | Book (edition) | | Berkshire RG11 2PY, England Van Nostrand Reinhold 480 La Trobe Street Melbourne, Victoria 3000, Australia...natural or synthetic but also to indicate the very mine from which it came! Inclusions are the most powerful...Harvard and additions. tions PC: Private Collection LA: Los Angeles County Museum (Los Angeles) COMMENTS...Madagascar Fluorite: locality unknown Rosiclare, Sphalerite: Illinois Chihuahua, Mexico Sillimanite: Williamstown...1 -20.2 7.9/2.1 8.4 4. 4. Beryl Aquamarine Mine, Brazil dark blue dark blue antique Brazil medium |  | | Book (edition) | | and pioneering work on tneory of quantitative France development analysis; of ion beam microprobe...m) 1A 6 1m ^A 6 6/A 2 6mm 6/m2/m2/m 23 ) , (I/la Isometric , 1A, Aim 422 Hexagonal* ~\A 2 3A...along the a axis. plane would be: A' A', which is la, ^b, ^c. Similarly the plane parallel to AA but... »c la: 16: ooc Intercepts for AA-la: »6:<»c A'A' -2a. co b. oo c oo a: 16: °o c AB-la: 16:...orthorhombic A -it- some an orthorhombic planes tal la: 16: and c fa intersects the a axis at ,c-vertical |  | | Book (edition) | | green garnet {p. 51 ). The fine green sphene in Case la admirably shows the strong dispersion, displaying...of iron and titanium oxides to the alumina, Ver neuil at last succeeded in preparing a clear transparent...Zerfass, Germany, Chatham, U . S . A . and Gilson, France. They contain veil-like inclusions and the constants...from the natural stones. More recently Gilson in France has produced synthetic b lack and white precious...other places and, in 1 902, an exceedingly rich mine---The Premier M ine-was found near Pretoria. In |  | | Book (volume) | | . . Layers of Foreign structure on a Growing Sphalerite Crystal. A. A. Shternberg . . . . . . . . • ...crystals and mixed crystals EuO + Gd (0.1-10"/0) EuO+(La, Sc, Ho, F, 2,,/0) EuO(Eu), EuO(O), EuTe(Br), EuTe(Gd)...substantially in shape and cross section, but all had the sphalerite structure. The thicknesses varied from a fraction...[7]. By the addition of definite impurities, e.g., La, in limited temperature ranges a (2H and 4H) whiskers... 2.2. Growth of SiC Whiskers in the System Si-C- La This second process takes place in a semiclosed cylindrical |  | | Book | | Underground working at Premier Diamond Mine zb. Grease tables at the Premier Mine 3. Removing the overburden covering...in Tanzania 15 b. Zoisite crystals from Merelani Mine 16. Large-scale production of synthetic corundum...am very grateful. The photographs of the zoisite mine and the crystals therefrom were kindly sent to me...properly Spessartine); orange manganese garnet Sphalerite Blende Succinite Amber Tan2anite Zoisite...been shared by almost all who have attempted to mine gemstones on a large scale by sophisticated methods |  | | Report (volume) | | . . Ex .. ... . ... Exp ta ... Extr . .... .. F la ..... ... G..... . . . . . G S. . . . . . . g s...Mexico n p . ... .... nopb.ceofpublicationgiven; nouvelle periode N S ...... Nova cotia n s .. . ..... new...Imperiale des science , belles-! ttres, et art de Lyon, La e des sciences, Memoires. A c Mex Cienc, An Academia...ewport, Vt. Ariz St Bur M ines, B Arizona Bureau of Mine , Bulletin. Tu on. Ark G S Arkan as, Geological...Report; Bulletin; Brit! h olumb:a Mini ter· o f Mine , Annua l Repot·t. B Sc N at Bulletin de ·c:cnce |  | | Book | | as part of afterdamp The gas remaining in a coal mine after an explo¬ the surveying operation, (b) The...plane is (010). Cf: Ala-B twin law. in the Alexo mine, Dundonald Township, Ontario, Canada. albite-Carlsbad...adjacent and whose interface forms a boundary France. curve (Levin ^t al, 1964, p.5). Cf: Alkemade...to deter¬ almandite A syn. of almandine garnet. mine that a clay is a rock flour and not composed of...differ from each other in Aquilonian Stage in France: uppermost Jurassic. It is equiva¬ some arbitrarily |  | | Book (edition) | | lands of the less than 1,000 feet continent La by mountain-regions than by any above the their...Auvergne, in is ; 22 PHYSIOGRAPHIC GEOLOGY. France, another, at about 1,100 feet; Bavaria another...reaching the Atlantic toward the southern system, the La Plata, south, between the converging east-and-west...forms, and cleaves easily into cubes. Blende (sphalerite), a compound of sulphur and zinc, in the proportion...(XX); 269, — c. Echinoderms. Stems of Crinoids, at La Grange, Minnesota (probably dean); and a single disk |  | | Book (edition) | | lower lands of Europe and Asia. The surface is ; ; La Plata of above the but they are marked off rather...elevation; Auvergne, in 22 PHYSIOGRAPHIC GEOLOGY. France, another, at about 1,100 feet; Bavaria another...North America. reaching the Atlantic toward the the La Plata, southern system, south, between the converging...forms, and cleaves easily into cubes. Blende (sphalerite), a compound of sulphur and zinc, in the proportion...Cornwall, England, Banffshire, Scotland, Vosges, France. They occur also in the pyrosclerite and williamsite |
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