 | | Journal (issue) | | Geological Society of Zimbabwe G Z S Newsletter February 2016 No. 1 of 3 of 2016 Faceted round brilliant...Society of Zimbabwe, P.O. Box CY 1719, Causeway, Harare Geological Society of Zimbabwe Newsletter ... ARTICLES AND REPORTS A Review of Diamonds in Zimbabwe ā a Century On. Part 2. ........................ 6 16 NEWS Geology Department, University of Zimbabwe ā Maideyi Meck ā¦ā¦ā¦ā¦ā¦ The Professor Tom Blenkinsop... Ā Ā Ā Ā 2 Geological Society of Zimbabwe Newsletter February, 2016 Editorial Another |  | | Journal (article/letter/editorial) | | Aventurine were found at Beit Bridge and I visited the District ComĀ missioner to enquire re legal implications...Chrysoberyl, CorĀ undum and Topaz is found at Somabula near Gwelo no rough material could be obtained...many years ago a great lake was situated in the Somabula area and this lake was fed by rivers from north...north of Salisbury. In the Miami area of this district we find the heart of the beryl mining area of...if one has enough perseĀ verance and ability. Emerald mining is controlled by very strict laws similar |  | | Report (issue) | | ZIMBABWE GEOLOGICAL SURVEY BULLETIN No. 90 The Erosion Surfaces of Zimbabwe L. A. LISTER, M.Sc., D.Phil...LIBRASĆ ZU - 06.01 Ćlungen ĆÆte Cstteilands 72& ZIMBABWE GEOLOGICAL SURVEY BULLETIN No. 90 iSRiC LIBRARY...Wagentngen, The Netherlands The Erosion Surfaces of Zimbabwe L. A. LISTER, M.Sc, D.Phil. ISSUED BY AUTHORITY...the erosion surfaces of Zimbabwe. She has lectured at the University of Zimbabwe since 1963 and this Bulletin...earlier authors had postulated. Cainozoic tilting in Zimbabwe, which raised the eastern margin of the country |  | | Journal (issue) | | Update on Emeralds from the Sandawana Mines, Zimbabwe J.C. (Hanco) Zwaan, Jan Kanis, and Eckhard J.... UPDATE ON EMERALDS FROM THE SANDAWANA MINES, ZIMBABWE By J. C. (Hanco) Zwaan, Jan Kanis, and Eckehard...is believed by some that the area now known as Zimbabwe was the fabled land of Ophir, which produced gold...gemologists the most important discovery was the large emerald deposit found in the mid1950s at the area called...geologic factors that contributed to emerald formation in this part of Zimbabwe, but it also offers new data |  | | Report (issue) | | interest in the geo logy and mineral resources of Zimbabwe which followed the removal of United Nations sanctions...original Bulletin is the insertion of Table IIIA, Zimbabwe Mineral Production and Value, on page 114A. Due...from the southern part of the craton up into the Midlands area and is everywhere overlain by a thick pile...at the Cotopaxi and Dickens mines in Victoria District in 1894, but it was not until the early l 900's...LARGE GOLD MINES Mine Geology and mineralization District Cam and Motor Gatooma Globe & Phoenix Que |  | | Report (issue) | | most highly p1Ā·ized varieties of pearl., diamond, emerald, ruby, sapphire and precious or '' noble '' opal...diamond is strictly limited by the producers. Emerald, the most precious of all gemBtones except pearl...th-e y are enjoying a great revival of vogue. Emerald, opal, peridot, aquamarine and cat's-eye are others...names as ' ' Brazilian sapphire,' ' ' ' U ralian emerald," '' Cape ruby," '' Matura diamond," and a host...10 carats would be even more valuable thai1 an emerald of sirnilar size and quality. The corundum g,e |  | | Report (issue) | | Trail in Gilgit-Baltistan DUDLEY BLAUWET 58. Zimbabwe Blue Topaz: St. Anne's Mine JAN KANIS 60. Brazil:...Kleine Spitzkoppe, Namibia; MokrushaĀ Mursinka District, Ural Mountains, Russia; Paprok, Laghman Province...(Simmons et al., 1987). Other pegmatites in this district contain abundant primary fluorite but no topaz...consistent with modem values for diamond, corundum, "emerald," various garnets, "chrysolite" (olivine), and...Kleine Spitzkoppe NYF-pegmatites in the Swakopmund District of Namibia have been known to produce nearly perfect: |  | | Book (edition) | | DIAMOND (Crystal) \(>l A MARINE EMERALD 5. 6. AQUAMARINJ t wr* EMERALD S. (Crystal in matrix) t ...Corundum {Sapphire, Ruby) 172 . XX. Beryl {Emerald, Aquamarine, Morganite) 184 PART IIā SECTION...royal blue of sapphire, the verdant green of emerald, and the golden yellow of topaz ā are and the...apparent profusion, the number species represented emerald, ruby, turquoise, topaz, amethyst are asked... diamond, ruby, we should add, and, and emerald, pearl, may indis- putably be considered to |  | | Journal (article/letter/editorial) | | and won for a profit (agate, amethyst, citrine, emerald, quartz, rose quartz, smoky quartz, morganite,... Hardness Beryllium Beryl and its varieties emerald, aquamarine, heliodor, morganite, goshenite, pezzottaite...berylThere (aquamarine/blue, heliodor/yellow, emerald/green, goshenite/colorless, phenakite and taaffeite...(aquamarine/blue, morganite/pink, heliodor/yellow, emerald/green, varieties of precious not a heavy mineral...from alluvial (fluvial) deposits in Tanzania. (b) Emerald fragments at the most proximal site to the alluvial | | | Book (edition) | | 137 . . . , 157 . . .172 XX. BERYL (Emerald, Aquamarine, Morganite) PART 184 . SECTION...the royal blue of sapphire, the verdant green of emerald, and the golden yellow of topaz are pure tints...the number of different Diamond, represented emerald, sapphire, species is restricted. opal, turquoise...sapphire, and, diamond, we should ruby, add, emerald, pearl, may and indis- putably be considered...ruby), crystallize The Many in (sapphire, (emerald, aqua- marine), tourmaline, quartz, phenakite |  | | Book (edition) | | durable, and beautiful gems. Synthetic ruby, emerald, and sapphire have become important marketplace...perfection can be a real liability in the case of emerald and gems. That origin of a is, corundum small...so-called precious stones were diamond, ruby, emerald, sapphire, pearl, and occasionally opal. The ...is argue with the statement that diamond, and emerald are gems. Opal is a gem, as are jade, lapis, garnets...example, glass used as a substitute for ruby or emerald). A homocreate is a manufactured with properties |  | Melcher, Frank, Graupner, Torsten, GƤbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, OberthĆ¼r, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalumā(niobiumātin) mineralisation in African pegmatites and rare metal granites: Constraints from TaāNb oxide mineralogy, geochemistry and UāPb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | NU 4.1.2. Congo Craton (DRC) 4.1.3. Zimbabwe Craton (Zimbabwe) 4.1.4. Kaapvaal Craton (South Africa)...Mineralogy 4.3.2. Kamativi Schist Belt (western Zimbabwe) 4.3.3. Orange River Pegmatite Belt (Namibia,...Birimian TE 5.1.4. Kaapvaal Craton D 5.1.3. Zimbabwe Craton 5.2.2. North-eastern DRC 5.3. Neoproterozoic...(Democratic Republic of the Congo), the Kamativi Belt (Zimbabwe) and the Jos Plateau (Nigeria). Mn-rich columbite-tantalite...late-orogenic (e.g., West African Craton, MA Zimbabwe Craton), post-orogenic (Kibara Belt, Damara Belt |  | | Book | | Marshall, Anthony E. Fallick and Yannick Branquet Emerald Deposits: A Review and Enhanced Classiļ¬cation Reprinted...review proposed an enhanced classiļ¬cation for emerald deposits based on the geological environment (magmatic... Russia (Ural mountains), Zambia (Kafubu) and Zimbabwe (Sandawana)). Their study demonstrates how these...one of the images (inclusions hosted in Russian emerald) for the cover page of this Special Issue book...A.; Marshall, D.; Fallick, A.E.; Branquet, Y. Emerald Deposits: A Review and Enhanced Classiļ¬cation. |  | | Journal (issue) | | of the stability and durability of nine common emerald-filling substances. pg. 99 NOTES AND NEW TECHNIQUES...improve their apparent clarity. A wide range of emerald-filling substances are used today, with varying...durability of nine common emerald-filling substances. Shown here is a pair of emerald and diamond earrings;...trading centers. Shown here is an Indian diamond and emerald necklace from the early 19th century. Courtesy...Rhodesia/ GLOBAL DIAMOND PRODUCTION SINCE 1870 Zimbabwe, Central African Republic, Tanzania, Brazil, Venezuela |  | | Journal (issue) | | fine rubies, a n d m u c h fine sapphire, is the district around Mogok in U p p e r Burma. This so-called...the kingās displeasure. Shortly afterwards the district was placed in charge of Governors or So-Thuygis...villages and left the district. K i n g Mindoon M i n then took over the district a n d control of the...per a n n u m . This was the last straw, and the district again entered a state of chaos. T h e villages...limestone, or marble. This is a common rock of the district and is said to be originally a sedimentary limestone |  | | Book (edition) | | DIAMOND 2. (Crystal) 4- AQUAMARINE 5. EMERALD 8. EMERALD 6. AQUAMARIN] TOPAZ 7. (Crystal in... . . .137 . . . . . .172 XX. BERYL (Emerald, Aquamarine, Morganite) PART 157 . 184 SECTION...royal blue of sapphire, the verdant green are of emerald, and the golden yellow of topaz pure to tints... is represented restricted. Diamond, ruby, emerald, sapphire, pearl, opal, turquoise, topaz, amethyst...afterwards is seen. Except that diamond, ruby, emerald, and sapphire, and, we should add, pearl, may |  | | Book (edition) | | SEMI-PRECIOUS (f) . 128 . . . Ruby) . ( Emerald, Aquamarine, Morganite) Beryl PART XXI. . ... gem of the some royal blue of sapphire, emerald, pure the considerably colours that ruby,...artistic merits opinion. this all some and emerald, pearl, the market, est ruby, add, Every...becoming and later as worthy is represented emerald, Yet, others many the number apparent profusion...aquaand ā Hexagonal Crystals. six-sided eg. emerald, faces, p (Fig. 9), Many in prism, terminated |  | | Book (edition) | | extensive fields in the prophetically named Kimberley district of Western Australia promise to be of world importance...in line with modern knowledge. In the cases of emerald and ruby and sapphire new sources of supply have...the incorporation in this work of my articles on emerald, ruby and sapphire, and marble, as well as a number...which consists of quartzite with tiny flecks of emerald-green mica (Figure 1.17). Of widespread occurrence...and are important as the source of chromium for emerald in these regions. In the formation of some schists |  | | Book | | gemstones. Cover illustration: A ruby, sapphire, emerald, citrine and diamond clip, mounted by Cartier,...rarer. For example, the red and green of ruby and emerald require a source of chromium; without it the corundum...corundum and beryl minerals, of which ruby and emerald are special varieties would be colourless or coloured...actinolite crystals (resembling bamboo stalks) in some emerald, quartz and garnet ā¢ anatase in rock crystal ā¢...kornerupine, corundum and spinel ā¢ chromite in emerald ā¢ diamond in diamond Formation of inclusions | | | Book | | rarer. For example, the red and green of ruby and emerald require a source of chromium; without it the corundum...corundum and beryl minerals, of which ruby and emerald are special varieties would be colourless or coloured...actinolite crystals (resembling bamboo stalks) in some emerald, quartz and garnet ā¢ anatase in rock crystal ā¢...kornerupine, corundum and spinel ā¢ chromite in emerald ā¢ diamond in diamond Formation of inclusions...phlogopite or fuchsite in quartz, emerald and corundum pyrite in corundum and emerald rutile in quartz spinel in |  | | Book (volume) | | Gemstones 2 Diamond 3 Ruby and Sapphire 4 Emerald, Aquamarine and Other Beryls 5 Chrysoberyl and...Fancy Coloured Sapphires . : : : : ; : F a feā Emerald: Crystal in Rock and Cut Stones ; = 82 : 00)...the incorporation in this work of my articles on emerald, ruby and sapphire, and marble, as well as a number...transparency and depth of colour as in the ruby or the emerald; through colour alone as in the turquoise; or through...scarce. This is so in the case of the emerald. A flawless emerald of fine colour is exceedingly rare and |  | | Book (edition) | | DIAMONDS, XIX. CORUNDUM (Sapphire, Ruby) XX. BERYL (Emerald, Aquamarine, Morga11ile) ā¢ ā¢ 172 184 PART II-SECTION...the royal blue of sapphire, the verdant green of emerald, and the golden yellow of topaz-are pure tints...species represented is restricted. Diamond, ruby, emerald, sapphire, pearl, opal, turquoise, topaz, amethyst...afterwards is seldom seen. Except that diamond, ruby, emerald, and sapphire, and, we should add, pearl, may indisputably...this system-corundum (sapphire, ruby), beryl (emerald, aquamarine), tourmaline, quartz, and phenakite |  | | Book | | Kingdom 193 United States of America 194 Zaire 203 Zimbabwe 203 Index 205 Preface When Peter Read asked...Brazil, Sri Lanka; Jos plateau, Nigeria; Volyn district, Ukraine, and numerous pegmatites throughout the...neighbouring topaz deposit in Egypt, near the emerald mines of Jebel Zabara, which were exploited from...stones (Ashbee, 1888). These are ruby, sapphire, emerald, and diamond, each correlated to the four elements...surprising, as he was familiar with the Saxon tin district which contains yellow topaz. An interesting description |  | | Book | | lithium and emerald; there have also been other gem finds. perhaps not as valuable a emerald,. but nevertheless...deposit of emeralds of the finest quality. Other emerald deposits of lesser importance have since been d...1,379 I 1 TOT AL S ļæ½-ļæ½ļæ½ NOTE:-Data relating to emerald production not published. ā¢ I t /nc/udes a small...yellow ,Ā·arictv and alcxandrile. arc known from the Somabula diamond gra,Ā·cls and f ro m the Fon Victoria an...been reco\'en:d from the 1 riassic gravels of Somabula. and its source may well have been in pcgmat itcs |  | | Book (edition) | | IT Io 1. BERYL CRYSTAL, 5. 5. BLUE BERYL. TO. EMERALD. ITI. 2. FIGURE OF 6. YELLOW DIAMOND. 12. ...4. SAPPHIRE. GOLDEN BERYL. 09. AQUAMARINE. 14. EMERALD CRYSTALS (IN MATRIĀ„) GEMSTONES by G. F. HERBERT...reproduce the photographs of the ā Devonshireā emerald and of the absorption-spectra of zircons, which... DIAMONDS MACHINES IN COLOUR āDEVONSHIREā EMERALD CRYSTAL ABSORPTION-SPECTRA XXXITI. OPAL XXXIV...the royal blue of sapphire, the verdant green of emerald, and the golden yellow of topazāare pure tints |
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