 | | 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 |  | | 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 |  | | Catalog/List | | Signed Client# (if known) Mr. Mrs. Ms. Dr. Bidder# name Address city STATE... It was probably collected in the 1870s-1880s by Dr. George A. Koenig when he visited the mines. He later...before 1971 - there is a label from the collection of Dr. Waddy J. Baroody of Columbia, S. Carolina, dated...does the Fluorite. The specimen was deemed part of Dr. Ed David’s Collection, but the piece does not bear...Offered at no reserve. Provenance: Keith Proctor, ex. Dr. Ed David [Hoppel #D1956] Estimate: $4,500-$5,500 |  | | 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) | | This book is respectfully dedicated to the memory of Dr. John Sinkankas for his kind initiative and support...haiiyne), they may have old Greek origins (e.g. epidote), less often Latin (e.g. lavcndulan), rarely 8...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 |  | | 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) | | R. Webster of the London Gemmological Laboratory; Dr. E. Giibelin, of Lucerne; Mr. R. Liddicoat, Director...Industrial Diamond Review; Dr. J. B. Hawthorne, Chief Geologist, De Beers, Kimberley; Dr. J W. Harris, Grant...University of Edinburgh; Dr. D. Elwell, Stanford University, California, U.S.A.; Dr. Robert Gaal, Gemological...Consolidated Mines, Dr. Judith Mi£lledge, Dept. of Crystallography, University of London; Dr. Godehard Lenzen...the first to the third century B.c. according to Dr. Godehard Lenzen. The Hope diamond, to which stories |  | | Book | | diamond in diamond Formation of inclusions 5 • epidote in rock crystal • garnet in corundum • hematite...2.4 Monoclinic crystals: (a) Orthoclase; (b) Epidote. Figure 2.5 Triclinic crystals: (a) Axinite;...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 (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 |  | | Journal (issue) | | dec orative p u rposes. Lincoln ( 1 927) notes that Dr. W. P. Jenney brought back specimens on his return...MATRIX • 1 33 letavivianire was first found by Dr. David H. Garske of the South Dakota School of Mines...end and tapered to 1 9 i nch es at the oth er end. Dr. Fran k L. Hess of th e Rare M.inerals Division of...Fisher, on assig n men t by t h e State Ge ologist, Dr. E. P. Roth rock , i n 1 942 FALL 2002 was the.../lie species and initiated cooperative work wit!, Dr. Pete Dunn ofthe Smithsonian Institu tion. As the |  | | Book | | HongKong Barcelona Budapest Professor Dr. A. B. KAMPUNZU Professor Dr. R. T. LUBALA Laboratoire de Petrologie...thank Springer-Verlag, the publishers, especially Dr. W. ENGEL (Geosciences Editorial) for the prompt...continental trough on the southern borders of the Congo and Thnzania cratons, though comparable in size...zones bordering respectively south and north the Congo craton (Fig. 1) has been recently compared (Popoff...between the West-African and the Sao Francisco-Congo cratons. Ultimately, as a rough estimate, three |  | | Book | | present , as well as chert o r q uartz, garnet or epidote m ay fo rm. the a m phi bo le fo r med may be actinolite...o r diopside- hede nbergit e ), fo rste ri te, epidote, a nd ga rnet (grossula ritea ndrad itc ) . T hese... Mi11cral Composition Wollnstonite CnSiO, Epidote P islacite (common epidole) Cn 2(AI · OH)(AI...of South Africa, 16; France, 3; Republic of the Congo, 3; Australia, 3. Among some other ores not listed...production Country Metal Congo, Republic of the (formerly Belgian Congo) Cobalt Niobium-tantalum Tin |  | | Book | | of America, 485 Zaire 601 (formerly Belgian Congo), Zambia, 602 485 Zimbabwe Norway, 486 (formerly...acknowledge the assistance of of those years by Dr. a of persons and San by the main Diego library...CA; Peter G. Denver, CO; Prof. B. Carroll Embrey, Dr. Paris, Museum (Natural Chatham, British France;...AZ; Carl Krotki, W. E. David Eidahl, History); Dr. Eugene Fallbrook, E. NY; XV Foord, Wardreques...Gilson, small Dr. Peter Bancroft, Fallbrook, Bassett, ians Mr. Atkins and Mrs. Brunton; Dr. or Morgan |  | | Journal (issue) | | Ideas.” WE DEDICATE this special Proceedings issue to Dr. Vince Manson, whose heart and considerable intellect... Harlow, Ed., The Nature of Diamonds, Dr. T. Anthony and Dr. J. Casey The General Electric Company ...diamonds. Acknowledgments: The authors thank Dr. Thomas Anthony and Dr. John Casey of GE Corporate Research &...dikes; St–star fissure; T–Tortiya alluvials; Ts–Tshikapa alluvials; V–Venetia pipe; Vo–Vaal/Orange Rivers...estimated to be: Botswana 26 Mct, South Africa 14 Mct, DR Congo 14 Mct, Angola 5 Mct, Namibia 2 Mct, rest of Africa |  | | Book | | Typical conditions of contact metamorphlsm) albite-epidote homfels f a d e s S: quartz, albite, muscovita...washing along the Kasai River near the town of Tshikapa (since 1909) and along the Bushimaie River near...with chlorite, slderite, actinolite, azlnite and epidote; in granites, quartzitee and mica-schists rock...axinite, sphene, tremolite, actinolite, talc, epidote, zoisite, fluorite, apatite, lazulite, wolframite...und grün des Lebens goldner Baum Mephistopheles to Dr· Faust (J.W. Goethe) In 1970s9 the production of |  | | Book (edition) | | granular masses. It alters to talc, chlorite, epidote, or an aggregate of ser¬ pentine an...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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