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| F. HUME, the Pioneers of the E astern Desert of Egypt 1\1:ultum non multa Plinius ]1-1,nior CONTENTS...OF SUEZ AND THE NORTHERN RED SEA . . . . . 7 . r. Tectonic map of Egypt by N. A. Syagaev . . . ...Southern Area of the Red Sea Hills towards the Sudan border (Photogeological map of Upper Egypt by Hunting, 1967)...1967) 4. Border area between Sudan and Egypt 5. A. Stratigraphic correction . . . . . . B. Tectonics... . . . . a) Fault Zones crossing the Northern Red Sea. b) The Cairo Graben . . . . . . c) The northern |
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| Hanni, Kail Schmetzer, and Heinz-Tiirgen Bernhardt Emeralds from the Mananjary Region, Madagascar: Internal...rubies, totaling 17.69 carats, accented by 34 emeralds and 375 rose-cut diamonds. Thirty-two rubies with...adorn the rock-crystal chalice, which also uses 53 emeralds and 513 grams of gold. Courtesy of Buccellati...Hurlbut Idaho Opal & Gem Corporation International Mines Outlet Craig Jackson E. Alan Jobbins Johnson Gems...Robert E. Kane Christopher Keenan Kimberley Created Emeralds John I. Koivula Lee Larson Lehrer Designs Jack |
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| Marshall, Anthony E. Fallick and Yannick Branquet Emerald Deposits: A Review and Enhanced Classiļ¬cation Reprinted...Mohamed, Supharart Sangsawong and Abeer Al-Alawi Emeralds from the Most Important Occurrences: Chemical...nondestructive methods. He is frequently visiting gem mines and pearl producing areas around the globe and often...and Karampelas et al. [12] present studies on emeralds; the bluish-green to green to yellowish-green...review proposed an enhanced classiļ¬cation for emerald deposits based on the geological environment (magmatic |
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| areas inert Indistinct lines may be seen at 6890Ć (red), 5090Ć (green), 4900Ć and 4600Ć (blue) Inert Often...colours often (blue/violet) ; Cr lines show whitish in red in bright green fluorescence varieties Not distinctive...distinctive Brighter green areas show Cr lines in red ; darker areas show some absorption of blue/violet...(variable) > 5 < 7 Brighter green areas show Cr lines in red ; general absorption of blue/violet General absorption...der Mineralogie, Vol. I I , Leipzig. 7 THE EMERALD OCCURRENCE OF MIKU, ZAMBIA By PROFESSOR DR HERMANN |
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| issue 2, 2009 I Vladimir I. Zhemakov URAL EMERALD MINES (Izumrudnye Kopi): Notes on Mineralogy Mineralogical...Geological Society The Mineralogy Museum of Ecole des Mines de Paris, France FAMOUS MINERAL LOCAUTIES SERIES...SERIES Vladimir Ivanovich Zhernakov Ural Emerald Mines: Notes on Mineralogy. Mineralogical Almanac , volume...current issue dwells on Mineralogy of Ural Emerald Mines: a deposit which Russain geologists and mineralogists...belongs to authors, 2009 0 Front Cover Photo Emerald President. 13.6 x 9.0 x 7.7 cm, weight 1172 g. |
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| Special Emerald 2018 ā Issue 40 All About Colored Gemstones World Emerald Update Highlights of the...the Second World Emerald Symposium, BogotĆ” International Gemstone Association AColored Publication of the...Issue 40 ā« ×ā¬InColor 1 2 InColor ā« ×ā¬Special Emerald 2018 InColorMagazine.com; Gemstone.org International... Contents In Side 5 Special World Emerald Update Editorās Note World Emerald Challenge: Origins and Appellation...Appellation 16 The Second World Emerald Symposium in Colombia The Second World Emerald Symposium Focuses on Responsible |
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| Keller FEATURE ARTICLES 80 Update on Emeralds from the Sandawana Mines, Zimbabwe J.C. (Hanco) Zwaan, Jan...recently some attractive transparent orangy pink to red rhodochrosites have become available as faceted gems...GEMOLOGY Summer 1997 79 UPDATE ON EMERALDS FROM THE SANDAWANA MINES, ZIMBABWE By J. C. (Hanco) Zwaan,...Sandawana mines have been an important producer of emeralds for 40 years. Since the mines came under...screening trommel plant. Sandawana emeralds can be readily separated from emeralds from other localities. They |
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| to lenses of actinolite-cummingtonite-phlogopite schist. Crystals of chrysoberyl (0.15 Ā 1.74 wt.% Cr2O...from green-dark green in natural light to purplish-red in incandescent light ā from a minor amount of Cr3+...ultramaĀ c rocks at the site of Be mineralization. Schist-type Be deposits, formed at the contact between...al., 1996). actinolite-cummingtonite-phlogopite schist (Fig. 3). This paper describes the results of a...opite schist; 41AA-11-1995 magnesite; 41AA-12-1995 actinolite-cummingtonite-phlogopite schist; 41AA-13-1995 |
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| Igmerald: I.G. Farbenindustrie flux-grown synthetic emerald Dr Karl Schmetzer1 and Dr Lore Kiefert2 1. Marbacher...Farbenindustrie flux-grown synthetic emerald were examined. The synthetic emeralds were grown between 1929 and... Introduction Historical background he first emerald synthesis which produced facetable crystals above...1935). Gemmological descriptions of this synthetic emerald were published in the same year (Eppler, 1935;...mineralogical investigations of the synthetic emerald crystals, e.g. by X-ray powder diffraction, were |
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| . . . . . . . . . . . . . . . . . . . . . . Amphibole and asbestos . . . . . . . . . . . . . . . . ...and mineralogy of amphibole and asbestiform minerals . . . 42.2. Magmatic amphibole and asbestos deposits...3. Metamorphic amphibole and asbestos deposits . . . . . . . . . . . . 42.4. Amphibole and asbestos supply...everybody's satisfaction, so that a vast part of the sea has still to be considered as an area of scientiļ¬c...Alunite Alunogen Amblygonite Amesite Amosite Amphibole Ca2Fe2Mg3(Si8O22)(OH)2 NaFeSi2O6 (Ce,Ca,Fe)(Ti |
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| . . . . . . . . . . . . . . . . . . . . . . Amphibole and asbestos . . . . . . . . . . . . . . . . ...and mineralogy of amphibole and asbestiform minerals . . . 42.2. Magmatic amphibole and asbestos deposits...3. Metamorphic amphibole and asbestos deposits . . . . . . . . . . . . 42.4. Amphibole and asbestos supply...everybody's satisfaction, so that a vast part of the sea has still to be considered as an area of scientiļ¬c...Alunite Alunogen Amblygonite Amesite Amosite Amphibole Ca2Fe2Mg3(Si8O22)(OH)2 NaFeSi2O6 (Ce,Ca,Fe)(Ti |
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| identification card that secures the privileges of many mines, quarries, clubs, societies, museums, libraries...HOADLEY (OBITUARY NOTICE) ............ 144 IRON MINES NEAR BILBAO, SPAIN ...............................showing some azurities from the world famous copper mines of Bisbee, Ariz. No collection could be worth while...colors and varieties. A most interesting group of emerald crystals from Bahia, Brazil, carried the name of...AND .MJN ERALS Fine loose emerald crystals from Bogota, Colombia, and emerald crystals in matrix from Crab |
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| in the stone you may actually see fossils of the sea creatures that swam in these ancient oceans. Your...stone could be a just the well-known gems such as schist, a rock formed when rubies and diamonds, but also...have to tell. magnifying glass might reveal tiny red spots under the magnifying glass. A rock hunter might...first great civilizations, such as that of Ancient Egypt. Tin only occurs in any quantity in the ore cassiterite...Stone Age people knew, and even practical dug mines to get at them underground. geological skill as |
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| ex., in August 1929, I learned that all of the mines were closed, that the trains had stopped running...me by interested persons. Santa Rita The Chino Mines of Santa Rita are working one of the largest low-grade...about five hours time in actual collecting at these mines, the following minerals were obtained: Native Copper...each oth er . Pyrite : Occurs everywhere 1n the mines, but n o good crystals were observed. Azurite :...coloring it a fine red; associated with native copper-was sent to me from the mines som e time after my |
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| municipio of Rovira.___________________________ Emeralds...--------__ ____ ___________ __ ------Muzo m...emeralds____________________^______________ Chivor mines.__________________----_--_--------_------------Gold...summary_________________-_-___---_---------Placer mines._________________--__---___-----------------Pato...____________________________ Munchique and California mines.___________________________ Choc6-_______-_--_-...In pocket 10. Map showing principal sources of emeralds and gold, Colombia- In pocket 11. Plan and sections |
 | Giuliani, Gaston, Groat, Lee, Fallick, Anthony, Pignatelli, Isabella, Pardieu, Vincent (2020) Ruby Deposits: A Review and Geological Classification. Minerals, 10 (7) 597 doi:10.3390/min10070597 | Journal (article/letter/editorial) |
| models; exploration 1. Introduction Ruby is the red gem variety of the mineral corundum. The name corundum...(coal). Two thousand years ago Pliny [2] called all red stones carbunculus (diminutive of carbo), which became...[4]. It is derived from the Latin ruber, meaning red. It became popular and then, until the introduction...introduction of the word corundum in the 19th century, most red stones were just called rubies. Experts and authors...traditionally from the modern-day Czech Republic (āred garnetā, either pyrope, almandine, and/or spessartite) |
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| H U N T I N G I N T H E APPALACHIANS diamonds, emeralds, rubies, sapphires, aquamarine, garnets, p e a...r o m a plateau 5,000 t o 7,000 * e t a b o v e sea level, t h e m o u n t a i n s o f t h e E a s t...have the quality of going well with other gems. Emeralds, rubies, sapphires, aquamarines, garnets, topaz...which has been known and worked since 1873. Gem emeralds, the most valued of beryls, were still found in...the Franklin area were made. The serpentine gem, emerald green williamsite was first described from West |
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| 5 MARINE FOSSILS: creatures preserved from the sea Protistids ā Sponges ā Coelenterates ā Bryozoans...constantly changing. Continents move about on a sea of molten rock. Jagged mountains rise to great heights...African gold mines are found in greenstone belts. In North America, the best gold mines are in the greenstone...cemented by iron oxide, which colored the rocks red. Their appearance, around 1 billion years ago, indicates...from 1.6 to 1.3 billion years ago.A broad belt of red granites and rhyolites, which are igneous rocks formed |
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| coarse-grained, dark greenish gray qtrartz-mica-amphibole schist that is markedly chioritic. Coarsegrained...are sharp, whereas those between pegmatite and schist are gradational over widths of a few inchesto as...structure is parallel to the foliation of the adjacent schist and gneiss(Figs. 1, 2) and appearsto be a relict...5 mm long. Small crystals of salmon-pink to wine-red spessartite occur mainly in the quartz- and beryl-rich...content from Quebecwith c,r:1.569,the Colombian emeralds,a beryl from Australia with o:1.583, and others |
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| crust, however, so that all the samples taken from mines and boreholes are only scratching the surface....structures are formed by the rapid chilling oflava by sea water, usually due to submarine eruption. (peridotite)...characteristic of some destructive plate margins. Sea floor spreading is the name now applied to the mechanism...igneous and metamorphic rocks such as granite, schist and gneiss, and an overlying sequence of sedimentary...as gypsum and halite formed by the evaporation of sea-water. 27 In the metamorphic environment, minerals |
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| for most mineral production. The majority of the mines still officially discourage collecting by workers...of beauty for their few cents' worth of metal. Mines that encounter specimens of great artistic and scientific...Mining and Mineral Museum, the Arizona Bureau of Mines, the Arizona Sonora Desert Museum, the Canadian...studies of inaccessible and abandoned mines. Someday many old mines may come again to life, reopened because...because studies of specimens that were saved when the mines were running have indicated that other minerals |
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| of Stones, the Picking Table, the UK Journal of Mines and Minerals, Mineral Up, and Tomasz Praszkier's...Northern England, Cornwall and Devon, Ste-Marie-aux-Mines, East and West Germany, Switzerland (three!), the...Beaverdell. The Beaverdell mine is one of several small mines in the Beaverdell silver-mining district of southern...pitchblende) and silver was exploited by several mines near Port Radium, on the eastern shore of Great...with crystals to 2 cm, to the 20 IO Ste.-Marie-aux-Mines show (De Ascen~ao Guedes, Lebocey and Bayle, 20 |
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| annals of natural gemstone studies, namely ruby, the red-colored gem variety of corundum. The color results...understood peak metamorphic processes associated with amphibole formation. These diļ¬erences were expected to show...samples came from three gem corundum deposit types. Amphibole-metamorphic ruby types included deposits from...Pb, with Ni showing good discrimination among amphibole-ruby deposits. Combined in an Ni Ć 100āTiāV Ć...excess of the chromophore ion Cr3+ that introduces a red color in comparison to the other colored variety |
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| one gemstone worthy of the name. Some, like the emeralds of North Carolina, the colorful and fabulous tourmalines...Canadian deposits was furnished by the Department of Mines and Technical Surveys of the Geological Survey of... Furcron, Chief Geologist of the Department of Mines, Mining and Geology; on the State of Michigan by...San Diego County, California, gemstones and the mines in which they occur are based largely on numerous...trip taken. Without his intimate knowledge of many mines and prospectsā and, more important, how to get to |
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| United States. North Carolina is a source of true emeralds and outstanding quartz crystals. New Hampshire...is from Stoneham and the best American green and red gem tourmalines are from Paris, Poland, and Newry...interest of the written account. There are many great mines or finds which have no surviving specimens to represent...the discovery of certain silver minerals in Maine mines is reduced due to the almost non-existence of specimens...specimens because they themselves remember which mines they have visited. If there were a never-ending |
