 | | Journal (issue) | | in minerals. V Q( er IO nc pl SU m Ste wl dr th N, w _,..,,..,w..,...,,..,,..,...............extensively as a scouring and cleans>f ing powder. es Dr. E. H . Barbour has described this IS volcanic ash...county f ulgurites have been described in detail by Dr. E. H. Barbour of the Nebraska State Museum and A...Sioux County, Nebraska. They were first collected by Dr. E. H . Barbour and described by him in the Proceedings...were first discovered, recognized and described by Dr. E. H . Barbour in 1910 and later de- scribed in |  | | Journal (issue) | | MILFREEPUB Director, Continental European Operations Dr. Walter F. Vogeno STAFF CORRESPONDENTS: Africa—Johannesburg...Wherever these copper ores are processed—in Belgian Congo—you’ll «+The machines crushing practice... wide...by Diamang in Angola, Forminiére at Tshikapa and Bakwanga, Congo Republic, by CAST in Ghana, SLST in...Africa, at Williamson in Tanganyika, and Bakwanga, Congo Republic is first transported to a central concentrating...Forestiére Miniére du Congo (et al) Companhia de Diamantes Sierra Leone Dig Tshikapa, de Angola Trust |  | | Report (issue) | | Switzerland • •• U.S.S.R. (Russia) Angola Belgian ••• Congo • • • • -.. • •• ••• •• • • •• • •• •...refractometer with a fixed scale, such as that devised by Dr. Herbert Smith, or one of the modern improved forms...the alluvial fields of Angola. a.n d the Be1lgian Congo. The syndicate made a cont1~act with the prodt1ce1·s...production of low-grarde stones in the Belgian Congo, the Gold Coast and other alluvial fields in Africa...J11alachite.-R.ussia, Rhodesia, United States, Belgian Congo. " • - 19661 B 2 80 : .World's Production |  | | Corporate Document | | AND NAMOYA CONCESSIONS, DEMOCRATIC REPUBLIC OF CONGO Prepared for: Banro Corporation Prepared by:...Figure 1.2: Location within Democratic Republic of Congo ..................................................Maniema provinces of the Democratic Republic of Congo (DRC) since 1995. Political unrest and legal title...AND NAMOYA CONCESSIONS, DEMOCRATIC REPUBLIC OF CONGO 1 INTRODUCTION 1.1 Terms of Reference Steffen...Exploitation Permits in the Democratic Republic of Congo (DRC). Steffen, Robertson and Kirsten (UK) Ltd |  | | Book (edition) | | pointed out errors of omissions in the first edition. Dr Kurt Nassau has been most helpful in advising on...based mainly on his information. My thanks go to Dr W E Smith of Chelsea College of Science and Technology...minerals which forms the first part of the book. Dr W Stern advised on the part dealing with the marketing...kindly prepared for me by Mr G A White of Norwich. Dr E Gübelin allowed the use of some of his excellent...appropriate here to mention that Plates I–XVI appeared in Dr E Gübelin’s Edelsteine, and are reproduced by courtesy |  | | Book (edition) | | This book is respectfully dedicated to the memory of Dr. John Sinkankas for his kind initiative and support...by Strunz (1996). Thanks to the kind permission of Dr. E. Nagele from the E. Schweizerbart'sche Verlagsbuchhandlung...arisen with localities in Congo-Zaire: the country, named Democratic Republic of Congo since 1960, was changed...There is also a country called Republic of Congo or simply Congo (capital Brazzaville). Information about...Precambrian dolomite near Kinshasa, Dern. Rep. of Congo. AM 57, 394-398, 1982. Allabogdanite (Fe,Ni) 2P |  | | Book | | bedroom and handed me my mail order copy of Professor Dr. Edward J. G0belin's new book 'Internal World of...From a gemological stand point, one word describes Dr. G0belin. That word is Inspirational. Micromlamellar...as it now exists, would not have been possible. To Dr. Byron C. and JoAnn Butler. This book would not have...remember the 'tuna tower,' long gone but not forgotten. Dr. Nikolai Sobolev. Through your research and publications...gemology, and a curiosity of its many mysteries. To Dr. Frederick H. Pough. I grew up on your teachings |  | | Book (volume) | | based mainly on his information. My thanks go to Dr. W. E. Smith of Chelsea College of Science and Technology...minerals which forms the first part of the book. Dr. W. Stern advised on the part dealing with the marketing...kindly prepared for me by Mr. G. A. White of Norwich. Dr. E. Gibelin allowed the use of some of his excellent...appropriate here to mention that Plates I-X VI appeared in Dr. KE. Giibelin’s Edelsteine, and are reproduced by...pearl surface photomicrograph specially for me, and Dr. EK. H. Rutland, Mr. B. W. Anderson, Mr. R. K. Mitchell |  | | Book | | produces the gem minerals nephrite, kyanite, staurolite and sillimanite. Many of these minerals, too...Figure 2.3 Orthorhombic crystals: (a) Topaz; (b) Staurolite; (c) Olivine. Figure 2.4 Monoclinic crystals:...crystals is called birefringence or double refraction (DR). Polarized light Light passing through an anisotropic... subtracting the lower from the upper to get the DR. The intermediate value, /?, then corresponds to...crypto-crystalline types of quartz such as onyx show a DR of about 0.006. This does not alter as the stone | | | Book | | produces the gem minerals nephrite, kyanite, staurolite and sillimanite. Many of these minerals, too...b) r Orthorhombic crystals: (a) Topaz; (b) Staurolite; (c) Olivine. c e a r (b) Figure 2.4 Monoclinic...crystals is called birefringence or double refraction (DR). Polarized light Light passing through an anisotropic... subtracting the lower from the upper to get the DR. The intermediate value, /3, then corresponds to...crypto-crystalline types of quartz such as onyx show a DR of about 0.006. This does not alter as the stone |  | | Book | | tantalite cassiterite beryl amphibolite facies (staurolite-kyanite subfacies), biotite granite, migmatite...hydrothermal solutions after metamorphism. 123 £ staurolite ¿i A l 4 P e.2+, " 0 2 ( 0 H ) 2 . (Si0 4 )...component harmful (min,) substances (max·) Notes staurolite andalusite formation of mullite refractory...clays containing organic matter· Kyanite and staurolite-kyanite mica schists with rausoovite, graphite...consists of sillimanite, kyanite, garnet and staurolite. The aggregate thickness of the three zones is |  | | Journal (volume) | | adventurers as in the early days, with examples from the Congo and the great Northern Territory of Australia. ...of The Leopoldville. junction the of of Tshikapa, village the Lovua river at with the Kasai...munition difficulties created by the war, and we are Tshikapa, escorted by Lieutenant Heide, with 50 soldiers...Societe Internationale Forestiere et Miniere du Congo, company tal is interested. office at in Travelling...Heide routed their forces, and the expedition pro- Congo State to investigated by this expedition hopes |  | | Journal (issue) | | FREEPUB Director. Continental F uropean Operations Dr. MILFREEPUB Charles Publish L. Shaw Street Manager...MINING WIDE FOR Algeria etaaie Congo Republic Republic of the Congo Ghana Kenya Morocco M-zembique Nigeria...and im- proves separating efficiency. Dr. Franz Rodis and Dr. J. Creme: The use and recovery of...pulps for reuse. The investi- gation was made by Dr. A. W. Last, chief, and Mr. K. F. Marquardson, a...research carried out in Great Britain, Belgium (Congo), France, and Sweden is dealing more with actual |  | | Book (edition) | | often a.ssociated with corundum, andalusite, staurolite, garnet, and rutile. It is found in the corundum...also be The c*xtra< tion of pota-^h liom alimitr is dr.^^crila'd und<‘r riia following drsrrij^tions of...can he molded andr>nng. (A few clays, surh as kaolin and flint clay...per cent of the work s total by weight. Belgian Congo is the largest producer and accounts for 00 to /O...in the south central part of the colony around Tshikapa. It is continuous with the Angolan ilia.nond field |
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