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| sources, e.g. Russia, Brazil, Sri Lanka, Madagascar, Zimbabwe, India and Tanzania, are being compiled and, in...crystal had been found 15 years earlier in the Maxixe mine. This beryl had a deep blue colour, which faded...location of the Maxixe mine in Minas Gerais, Brazil, and state that the mine was closed when the loss...trapiche tourmalines originate from the Kavungu mine near Page 152 the small village of Jivunda, southwest...Kroeker, S., 2008. Mushroom elbaite from the Kat Chay mine, Momeik, near Mogok, Myanmar: II. Zoning and crystal |
 | Pautov, L. A., Popov, M. P., Erokhin, Yu. V., Khiller, V. V., Karpenko, V. Yu. (2013) Mariinskite, BeCr2O4, a new mineral, chromium analog of chrysoberyl. Geology of Ore Deposits, 55 (8) 648-662 doi:10.1134/s1075701513080096 | Journal (article/letter/editorial) |
| metasomatic rock replaced ultramafic rocks with phlogopite schist complexes; (8) volcanic–sedimentary sequence;...Sretensky (Sverd lov). (4) Cheremshansky; (5) Khitny Mine (Krasnoarmeisky); (12) settlement. culation of...Sretensky Mine was commissioned. In 1832, Troitsky Mine was founded 4 km north of the first mine, and in...Mariinsky deposit, located 8.5 km north of the Sretensky Mine, was dis covered. Archival materials on the Ural...hosted in quartz– plagioclase veins and bodies of phlogopite schists, controlled by nearmeridional faults |
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| 22, 5 'Machingwe': A new emerald deposit in Zimbabwe Jan Kanis*, Charles E.S. Arps** and Pieter C....in the Mweza Range Greenstone Belt of southern Zimbabwe are discussed and compared with data from Sandawana...visit to a newly discovered emerald occurrence in Zimbabwe, named 'Machingwe deposit', thanks to the kind...assistance of the Mineral Marketing Corporation of Zimbabwe. This Corporation is a state controlled department...the ultramafic rocks into biotite and biotite-phlogopite schists. A similar lithology has been reported |
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| is initially used to divide the incoming "run-of-mine" shipments of diamonds into two groups called smalls...occurrences visited were the Novello Prospect a n d the abandoned Twin Star Mine, both of which are located...located some 6 km north of the famous Bikita lithium mine about 80 km east of Fort Victoria. Details of the...setting of the three emerald occurrences (viz. Novello, Twin Star, Chikwanda) is very similar. There is...been intruded by granite or granodiorite. At the Novello and Chikwanda areas the serpentine is thought to |
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| falls on the southern boundary of the Monaragala District in Uva Province. The site is accessible by a gravel...such as a 127 ct cape diamond from the Kimberley mine in South Africa that was also recently graded by...A typical type IaAB pink diamond—from the Argyle mine, for example—shows a characteristic visible spectrum...California). He indicated that since the California Blue mine has been worked primarily for mineral specimens...another one-week mining project at the California Blue mine yielded several more aquamarine crystals of good |
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| ruby and moonstone) photographed at the home of a mine owner in Mogok, Myanmar. Two field reports on Mogok...the blue gem silica was found at the bottom of a mine shaft, and was completely worked out by the miners...rare stones for a research project. The largest mine toured during this trip was operated by Lian Shan...g. Figure 21). During a visit to a small private mine east of Bamon village (located south of Mogok)...Shan mine near Ingaung. Photo by U Tin Hlaing. Figure 20: The washing plant at the Lian Shan mine is fully |
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| the ultramafic schists are usually altered to phlogopite--biotite--tourmaline aggregates and the minor...Zambian occurrences and those of South Africa and Zimbabwe. INTRODUCTION The emerald deposits o f Zambia...dated microcline from pegmatites at the Luanshya Mine (Shelling et al., 1972), and is probably related... Schistosit y - st rike, dip ~'~-~ Biotite- phlogopite schist Fig. 3. Geological maps of (a) Nkabashila...PROSPECT E ~ G [ ~ E N D Biotite - phlogopite ~ ] Talc [ ~ Quartz-muscovite -ch[orite |
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| moving products from mine to consumer. The main cover image was taken at the AnahÌ mine in Bolivia, a major...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...of the company (Even-Zohar, 2007). Because of the mine closures, De Beers’s market share by volume fell...pink diamonds (0.51 and 0.55 ct) from the Argyle mine in Australia were part of the 2007 Argyle pink diamonds...had acquired a 32.8% interest in Angola’s Catoca mine in the early 1990s. Commissioned in 1997, Catoca |
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| Caplan. The back cover shows emeralds from the Chivor mine in Colombia (3.90 ct faceted stone and 2.35 cm crystal)...difficult to be certain the stones came from the mine where they were collected. Careful documentation...$243,703 per carat. Unheated ruby from the Didy mine in Madagascar also commands high prices (Pardieu...(U-Pb dating of monazite) with ruby formation in phlogopite rocks (Krebs et al., 2019). The second period...zircon in host rocks of ruby from the John Saul mine in the Mangare area of Kenya (612 ± 6 Ma; Simonet |
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| Gemm., 1978, XVI, 3 173 come from a particular mine or deposit but was found as detritus in the soils...south side of the Mweza Greenstone Belt, Belingwe District, 5.2 km west-southwest of the confluence of the...is an alteration of the ultramafic schists to phlogopite-biotite schists. From the limited amount of observation...vicinity of the resulting veins are altered to phlogopite-biotite schists. The deposit then consists of...districts but in the Belingwe District emeralds are not confined to the phlogopite zones. Tremolite and tremolite-chlorite |
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| ISSUE 21 RECORD-BREAKING RUBY DISCOVERY THE DIDY MINE, MADAGASCAR An Outlook on the Resource-rich Hunan...Record-breaking Discovery of Ruby and Sapphire at the Didy Mine in Madagascar: Investigating the Source Gemology...trademark, although he says he has the only license to mine and export Turkish Diaspore. Milenyum Mining Limited...71 for its ethically mined stones from the Kagem mine in Zambia. That compared with an average of US$38...high-quality ethically sourced emeralds from our Kagem mine in Zambia. “During the coming year, we will also |
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| I n Central Queensland, near the Southern Cross Mine, these "yowah n u t s " as they are called were...might provide the capital necessary for machinery to mine bauxite, including high-pressure hoses, diesel operated...quartz, a n d black sand. T h e possibility of a gold mine operating within sight of the Great Dividing R a...der Novello Claims in Rhodesien. Mineralogical examination of the alexandrite found in the Novello claims...geographical-geological occurrence of the alexandrites in the Novello claims in South Rhodesia is described. T h e crystals |
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| REMARKS by PROFESSOR R. A. L. BLACK 95 MISTRESS MINE by H.J. MARTIN 96 DELEGATES IN ATTENDANCE • INDEX...excess of 12 million pound, already. valued ·at mine·. The main minerals. of cot1r,e. have been tin....particularly the tructure at depth. As Minister of Mine . 1 am extremely interested in the po sibilities...the unwcathcred zone. is much more expensive to mine. The coarse beryl con tent of many pcgmatites is...differential thermal analysis. LITHIUM: The Ilikila mine. the subjec1 of a detailed paper. is by far the |
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| crystal with calcite, 6.5 cm, from the Cosq uez mine, Colombia; found in 1998. Scott Rudolph collection............................................... 22 Mine Exploitation (or not) Today ......................occurrences (abandoned), The Nemoc6n mine is primarily a salt mine refitted as a tourist attraction; it...simpler and more familiar terms throughout. The Muzo district, centered about 8 km west of the town of Muzo...is the Muzo mine proper, and 12 km north of that lies the almost equally famous Cosquez mine; both of these |
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| 200 known here-holds the productive Mwadui diamond mine, known for Yeryfine, rare, pink diamonds. Emerald...Garnets of East Africa 73 Rh.odolite of the Lindi District, Tanzania 76 Tsavorite Garnets 76 The Pyrope-...Tanzania 96 Red Dravite Tourmaline from the Narok District, Kenya 99 Uvite-Dravite Chrome Tourmaline 99 ...Williamson Mine and operations. 21 Figure 2.5. A 2. 9-carat pink diamond from the Williamson Mine. 25 Figure...crystal. 77 Figure 3.12. Umba, Tanzania, corundum mine. 42 Figure 6.3. Campbell Bridges. 78 Figure 3 |
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| (formerly Belgian Congo), Zambia, 602 485 Zimbabwe Norway, 486 (formerly Rhodesia), 603 488 ...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock...location of the mines Holland’s translation, of district, and it could have been Probably these mines...north of Thebes. No emeralds exist the emerald mine through stones. Qift as as other mineral, ... he cited Rome time, and the “Peruvian emerald mine” is described the lead a was “A beautiful |
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| (field of view 8 cm). Figure 1.3 An opencast iron ore mine (Postmasburg, South Africa). 7 microscopes, or...the garnet solid solution series: (A) almandine (Zimbabwe, 2.5 cm); (B) andradite (left, 6 cm) and grossular...from Kayes region, Mali); (C) grossular (Jeffrey mine, Canada, 5.6 cm); and (D) spessartine (Marienfluss...sequential patterns as the crystal grew (Messina mine, South Africa, 8.5 cm). (D) (C) Crystals that...Examples of twinning: (B) V-twinned cerussite (Kombat mine, Namibia, 4 cm); (C) twinned calcite crystals studded |
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| about identifying a Figure 1.3 An opencast iron ore mine (Postmasburg, South Africa). microscopes, or chemically...the garnet solid solution series: (A) almandine (Zimbabwe, 2.5 cm); (B) andradite (left, 6 cm) and grossular...from Kayes region, Mali); (C) grossular (Jeffrey mine, Canada, 5.6 cm); and (D) spessartine (Marienfluss...sequential patterns as the crystal grew (Messina mine, South Africa, 8.5 cm). Crystals that grow slowly...of twinning: (B) V-twinned ; cerussite (Kombat mine, Namibia, 4 cm); (C) twinned calcite crystals studded |
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| efforts and promising early results, the emerald mine has not yet begun production. 2 GEMS & GEMOLOGY...deposit is located near the Bonfim gold-tungsten mine (figure 2), at coordinates 05°50.45¢S, 036°07.10¢W...basement gneiss, close to the Bonfim goldtungsten mine, which is hosted by metasedimentary rocks. Modified...collected by author JCZ during his visit to the mine. Parallel plates were cut and polished from three...rounded crystals of sodic plagioclase, platelets of phlogopite, thin flakes of hematite, and clusters of minute |
 | | Report (edition) |
| tourmaline crystals from Yinnetharra. Set in a black phlogopite schist, these crystals, many doubly terminated...sawable diamonds (average 2 ct) from Ellendale diamond mine (courtesy Kimberley Diamond Company) Contents...Western Australia ................ 22 AK1 diamond mine in the east Kimberley region .....................looking north over the Bow River alluvial diamond mine processing plant and tailings dams ........ 25 Geological...Geology of the area surrounding the Curlew emerald mine, Tambourah region ............................. |
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| localities where it occurs are Be1vadi in the Hassan district of Mysore and the Coimbatore, Fig. 1. Transmission...pronounced. Green aventurine from the Bellary district, India, was studied in order to determine the...significance which may be some miles away from the actual mine (e.g. Sandawana). Where a name is used on a map...Arctic region, District of of Franklin, Northwest Northwest Territories, in the District of Field parties...lapis lazuli deposits (in white marble). Fig 3. Phlogopite mica pit near the south lapis lazuli occurrence |
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| Mining personnel inside the Argyle block cave mine...................................................looking north over the Bow River alluvial diamond mine processing plant and tailings dams.......... 20...Geology of the area surrounding the Curlew emerald mine, Tambourah region.................................... 45 Gem beryl stones from Williamson’s beryl mine in the Yinnetharra area...........................Cabochons of amazonite from Melville in the Yalgoo district.............................................. |
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| stone came from — some¬ times down to the actual mine. Today it is commonplace to see in sale catalogues...in topaz and euclase • • • • • mica: biotite, phlogopite or fuchsite in quartz, emerald and corundum pyrite...and dolomite is also found. Red-brown flakes of phlogopite are prominent. No rutile silk has been seen,...mica and chlorapatite. The Sandawana emeralds of Zimbabwe show tremolite crystals which are more hair-like...mica. The large brown crystal was found to be phlogopite mica. Black grains also found in the stone turned |
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| the stone came from - sometimes down to the actual mine. Today it is commonplace to see in sale catalogues...hematite in topaz and euclase mica: biotite, phlogopite or fuchsite in quartz, emerald and corundum pyrite...and dolomite is also found. Red-brown flakes of phlogopite are prominent. No rutile silk has been seen,...mica and chlorapatite. The Sandawana emeralds of Zimbabwe show tremolite crystals which are more hair-like...mica. The large brown crystal was found to be phlogopite mica. Black grains also found in the stone turned |
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| Mandarino Famous mineral localities: the Ichinokawa mine, Japan ............. 229 ': Rotors w^c; ; 'v Tampa...^ 'G by P. Bancroft Mineralogy of the Bandora mine, South Mineral Creek, San Juan County, Colorado... Calcium arsenate minerals new to the Getchell mine, Nevada ..........................................world’s best, were discovered in the Ichinokawa mine more than a hundred years ago. Though collected...mineral collectors. E LOCATION The Ichinokawa mine is located approximately 7 kilometers east of Saijo |
