 | | Journal (issue) | | gems. 322 Rubies and Sapphires from Winza, Central Tanzania Dietmar Schwarz, Vincent Pardieu, John...“D-TO-Z” DIAMONDS diamonds from the Cape of Good Hope region, and “Jager” for colorless diamonds with strong...of color in a diamond. In the New York jewelry district on Maiden Lane, neighboring buildings were painted...the blue region of the spectrum, as it is the absorption area of wavelengths in this region that allows...the 6-watt lamps used in the past. Here, the UV region shows good agreement between the three lamps. Note |  | | Journal (issue) | | expedition to Tanzania's new ruby deposit in Winza 44 New Tanzania mine uncovers exceptional rubies 46 BaselWorld...South Korea Kamal Kothari, India Bhadresh Pandit, Tanzania Clement Sabbagh, Brazil Capt. Ramji Sharma, Japan...century, when the region became Islamic. Fishing and pearl-diving supported the region for many centuries...high-level exhibitions and fairs will push this region as a new key player for the development of the...established to ambassador to the UAE. service the region, GemBureau A s for the jewelry business, Dubai |  | | Book | | GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published by Struik...resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties 21 A to...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...starting in what was then Tanganyika ( now mainland Tanzania) and then progressing to Kenya - I am proud to...countries are among the finest in the world. The region and its gems are particularly dear to my family |  | | Journal (article/letter/editorial) | | gneisses of the Mozambique belt in northeastern Tanzania and southeastern Kenya. There, metamorphic fluids...3). At a few localities, such as in Kenya and Tanzania, Cr3+ and V3+ are the minor components responsible...Corundum For many years, rubies from the Mogok region of Burma were considered the fi nest in the world...separate rubies from Vietnam/Burma versus Thailand or Tanzania. For a more general distinction of ruby localities...intensity and shape of absorption bands in the OH region of the electromagnetic spectrum provide a test |  | | Journal (issue) | | to the Big Four, i.e. diamond emerald, ruby and sapphire. Recently, though, what were considered new trends...than others. Similar analogies apply to ruby and sapphire. Since material differs in color and appearance...number of remarkable creations, including blue sapphire rings (Burma, Madagascar and Sri Lanka), a Cartier...above estimates of $150,000 to $200,000. Ceylon sapphire (19.10 cts) and circular-cut diamond ring in platinum...Gemstone.org InColor Cushion-cut Madagascar sapphire (16.88 cts) and triangular-cut diamond Bulgari |  | | Journal (issue) | | in quartz • Inclusions within inclusions • Blue sapphire with high concentration of REEs 164 Gem News...phosphorescence in diamond • Almandinespessartine from Tanzania • “Red andesine” • Orange beryl from India • Clinochlore...Clinochlore from Turkey • Yellow danburite from Tanzania • Lawsonite from California • Paragonite from...• Tanzanian rubies • En echelon inclusions in sapphire • Serpentinite artifact • Star topaz • Persian...Edward J. Gübelin. The blue topaz (11.54 ct) and sapphire ring set in 18K gold (no. 30973) is a gift of |  | 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) | | uncommon on Earth but the gem varieties of ruby and sapphire are relatively rare. Gem corundum deposits are...Vatomandry; (2) Andriba; (Antsirabe-Antanifotsy region, Soamiakatra-Ambohimandroso; Ambohibary); (3) Zazafotsy;...Zazafotsy; Ankaratra (Antsirabe-Antanifotsy region, Soamiakatra-Ambohimandroso; Ambohibary); (3)IlakakaZazafotsy;...John Saul mine; Penny Lane; Aqua, Hard Rock). Tanzania: (10) Umba (9) Mangare (Rockland-formerly John...Aqua, Hard Rock). Tanzania: (10) Umba valley; (11) Longido, Lossogonoi; (12) Winza; Loolera (Kibuko); |  | Krebs, Mandy, Hardman, Matthew, Pearson, David, Luo, Yan, Fagan, Andrew, Sarkar, Chiranjeeb (2020) An Evaluation of the Potential for Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus Sr–Pb Isotope Compositions. Minerals, 10 (5) 447 doi:10.3390/min10050447 | Journal (article/letter/editorial) | | Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus Sr–Pb...Keywords: geographic origin determination; ruby; sapphire; trace elements; radiogenic isotopes; linear discriminant...Gem corundum, especially the red ruby and blue sapphire varieties, are among the most valuable gemstones...source of Madagascar, for the metamorphic blue sapphire group; and (4) Australia, Thailand, and Cambodia...formed unrelated to these periods, such as the Yogo sapphire deposit in Montana, USA (360 to 325 Ma, Ar–Ar |  | | Journal (issue) | | 45 NO. 4 Ruby-Sapphire Review Nanocut Plasma-Etched Diamonds Chrysoprase from Tanzania Demantoid from...__________________ 236 Carat Points 260 pg. 251 Ruby and Sapphire Production and Distribution: A Quarter Century...Chrysoprase and Prase Opal from Haneti, Central Tanzania James E. Shigley, Brendan M. Laurs, and Nathan...the Kagem mine, Zambia • Yellow grossular from Tanzania • An unusual blister pearl • Myanmar report •...worldwide. This sapphire necklace, designed by David Webb, has approximately 700 carats of sapphire beads. The |  | | Book | | Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus Sr–Pb...the Australasian region. He works closely with his counterparts from the SE Asia region. He leads industry-CODES-funded...a rare peraluminous ensemble in which ruby and sapphire associate with spinel and sapphirine in a highly...included deposits from Montepeluez, Mozambique; Winza, Tanzania; Andilamena/Zahmena and Ampanihy/Toliara, Madagascar...Jegdalek, Afghanistan; Morogoro, Tanzania. Metamorphic blue sapphire deposits included Andilamena and |  | | Journal (article/letter/editorial) | | This study acquired LIBS spectra from 569 rough sapphire and ruby specimens from 21 localities in 11 countries...identifications, are 98.9% (sapphire) and 96.0% (ruby) for country of origin and 97.9% (sapphire) and 95.4% (ruby)...with a high level of success. Keywords: Ruby, sapphire, provenance, laser-induced breakdown spectroscopy...breakdown spectroscopy (LIBS) from 569 ruby and sapphire specimens from 21 localities in 11 countries to...models that sequentially compares spectra from one region to all other regions. This method has proven successful |  | | Journal (article/letter/editorial) | | is called pink sapphire, yellow sapphire etc., while the blue gem corundum is sapphire. Red, pink and...precursor (Polat et al. 2009). The greater Fiskenæsset region was meta; 50°W Grædefjord ; den æsfjor ;...Mogok 40 Maniitsoq Storø Kapisillit Nattivit Winza Umba Tunduru Sahabano Zazafotsy 60 Qaqqatsiaq...Chanthaburi in Thailand, Pailin in Cambodia and Winza in Tanzania. Rubies from all these localities are hosted...granulite-facies relations in the Fiskenæsesset region, southern West Greenland. The Journal of Geology |  | | Journal (issue) | | to present to you the steps taken to analyse a sapphire, revealing all the relevant information, before...pre-existing damage. Two gemmologists check the sapphire quickly, using classic gemmological instruments...gemmologist. SSEF Facette No. 17, © 2010 Kashmir sapphire of 42 ct of exceptional beauty, certified recently...and their standardised analytical routines. The sapphire is first analysed by X-ray fluorescence (ED-XRF)...iron, and gallium. To measure these elements in a sapphire requires a series of XRF analyses, using different |  | Wang, Kandy K., Graham, Ian T., Lay, Angela, Harris, Stephen J., Cohen, David Ronald, Voudouris, Panagiotis, Belousova, Elena, Giuliani, Gaston, Fallick, Anthony E., Greig, Alan (2017) The Origin of A New Pargasite-Schist Hosted Ruby Deposit From Paranesti, Northern Greece. The Canadian Mineralogist, 55 (4) 535-560 doi:10.3749/canmin.1700014 | Journal (article/letter/editorial) | | Paranesti occurrences to be most similar to the Winza, Tanzania ruby deposit, whilst there are some similarities...pigeon’s blood color), through to Madagascar and Tanzania in Africa, and along the eastern boundary of Australia...the snow-capped continent of Greenland. Ruby and sapphire are both gem varieties of the mineral corundum...the blue, yellow, and green suite of colors of sapphire are due to small amounts of Fe2þ, Mg2þ, Fe3þ,...similar maficultramafic hosted deposits within this region? GEOLOGICAL SETTING Regional tectonic framework |  | Voudouris, Panagiotis, Mavrogonatos, Constantinos, Graham, Ian, Giuliani, Gaston, Melfos, Vasilios, Karampelas, Stefanos, Karantoni, Vilelmini, Wang, Kandy, Tarantola, Alexandre, Zaw, Khin, Meffre, Sebastien, Klemme, Stephan, Berndt, Jasper, Heidrich, Stefanie, Zaccarini, Federica, Fallick, Anthony, Tsortanidis, Maria, Lampridis, Andreas (2019) Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis. Minerals, 9 (1) 49 doi:10.3390/min9010049 | Journal (article/letter/editorial) | | tectono-metamorphic units. In the Xanthi area, the sapphire (pink, blue to purple) deposits are stratiform...blue sapphires, 4777 for purple and 3301 for pink sapphire from Naxos plumasite, and finally 4677 to 1532...respectively δ18 O of 4.9 ± 0.2‰ for sapphire in plumasite, 20.5‰ for sapphire in marble and 1‰ for ruby in mafics...gemstones. Keywords: corundum megacrysts; ruby; sapphire; plumasite; metamorphic-metasomatic origin; Greece...Ma) [2,4–10]. Magmatic and metamorphic ruby and sapphire deposits related to the Pan-African orogeny are |  | | Journal (issue) | | Industry News 6 10 14 General Industry News Tanzania Hosts International Gemmological Conference The...murdered by illegal miners in the Taita Taveta District in Tsavo National Park, Kenya. As the news spread...name in the gem and jewelry industry. Ruby and Sapphire Expert Hughes Wins Bonanno Award R ichard W...the gem and jewelry trades. His book, Ruby and Sapphire, is considered the standard work on the subject...info@paul-wild.de www.paul-wild.de INDUSTRY NE WS Tanzania Hosts International Gemmological Conference T |  | | Journal (issue) | | Argyle, courtesy of Rio Tinto; (4) an 11.16 ct sapphire from Madagascar, GIA Collection no. 31618; (5)...courtesy of Aurora Gems; (6) a 9.15 ct ruby from Winza, Tanzania, courtesy of Hakimi & Sons; (7) a 14.80 ct...fields. Likewise, beryllium diffusion of ruby and sapphire brought together geologists, gemologists, and...exports from Myanmar disrupted supply channels for sapphire and ruby. And the proliferation of new sales avenues...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS |  | Keulen, Nynke, Thomsen, Tonny B., Schumacher, John C., Poulsen, Majken D., Kalvig, Per, Vennemann, Torsten, Salimi, Rita (2020) Formation, origin and geographic typing of corundum (ruby and pink sapphire) from the Fiskenæsset complex, Greenland. Lithos, 366. 105536pp. doi:10.1016/j.lithos.2020.105536 | Journal (article/letter/editorial) | | and geographic typing of corundum (ruby and pink sapphire) from the Fiskenæsset complex, Greenland Nynke...and geographic typing of corundum (ruby and pink sapphire) from the Fiskenæsset complex, Greenland, LITHOS...FISKENÆSSET COMPLEX, TYPING OF CORUNDUM (RUBY AND PINK SAPPHIRE) GREENLAND Nynke Keulen1,* ntk@geus.dk, Tonny...as ruby and to all corundum of other colours as sapphire(s), irrespective of the quality (gem, semi-gem...Ruby in Kangerdlussuaq (Maniitsoq region) and on Storø (Nuuk region) formed by a metamorphic reaction |  | | Journal (issue) | | alluvial sapphires from Russia’s Jewish Autonomous District. 266 A New Deposit of Gem-Quality Grandidierite...pearls • Black star sapphire filled with lead glass • Green lead glass–filled sapphire rough • Large crystal...in Mexico • Colored gemstone mining update from Tanzania • Purple pyrope-almandine garnet from Mozambique...rhodochrosite • Rubies reportedly from Pokot, Kenya • Blue sapphire reportedly from Badakhshan, Afghanistan • “Punsiri”-type...“Punsiri”-type spectral features in natural yellow sapphire • Large aqueous primary fluid inclusion in amethyst |  | | Journal (issue) | | 536 Geographic Origin Determination of Blue Sapphire Aaron C. Palke, Sudarat Saeseaw, Nathan D. Renfro...Shane F. McClure In some cases, the value of a sapphire depends strongly on its geographic origin. This...details the origin data GIA has collected for blue sapphire and describes its methodology for using the data...left: a 64.45 mm Sri Lankan sapphire crystal, a 24.34 ct Sri Lankan blue sapphire, two cuprian tourmalines...and 45.74 ct), a 16.65 mm pink-purple Sri Lankan sapphire crystal, a 10.90 ct Burmese ruby, and an 11.11 |  | | Journal (article/letter/editorial) | | a rare peraluminous ensemble in which ruby and sapphire associate with spinel and sapphirine in a highly...included deposits from Montepeluez, Mozambique; Winza, Tanzania; Andilamena/Zahmena and Ampanihy/Toliara, Madagascar...Jegdalek, Afghanistan; Morogoro, Tanzania. Metamorphic blue sapphire deposits included Andilamena and...high-Fe metamorphic ruby, marble-type ruby and blue sapphire fall into discrete fields with only minor overlaps...triangular figure, it separated fields from Winza, Tanzania, Namehaca, Minerals 2020, 10, 888 5 of 10 |  | | Journal (issue) | | Gemmological Institute - The Future of Gem Testing - Winza Rubies - Micro x-ray tomography of pearls - Age...quality of a series of such scratch-resistant “sapphire glasses” for the Swiss watch industry. Photo:...copper-bearing tourmaline from Mozambique, rubies from Winza in Tanzania) the future does not look grim; in fact it...been Small roundish dust flakes in an unheated sapphire from Kashmir. © H.A. Hänni, SSEF SSEF Facette...sophisticated Rhombic oriented dust flakes in an unheated sapphire from Madagascar. © H.A. Hänni, SSEF page 3 Focus |  | | Journal (issue) | | Haüyne from Oldoinyo Lengai Volcano, Northern Tanzania Anatoly N. Zaitsev, Olga A. Zaitseva, Alexander...from Kenya • New rubies from Mozambique • Yogo sapphire update • Topaz with unstable brown color • Pink...treatments have focused on amber from the Baltic Sea region (which includes localities in Poland, Scandinavia...belonging to the family Fabaceae. Copal from Colombia, Tanzania, and Madagascar, as well as amber from the Dominican...four sources (Colombia, Brazil, Madagascar, and Tanzania); and a representative piece of untreated amber |  | | Journal (issue) | | from the small village of Rodrigo Silva, in the district of Ouro Preto in Brazil’s Minas Gerais state,...Ferrifero (QF), which corresponds to an iron-rich region. In fact, there are many iron deposits and mines...Burma, Badakhshan (Afghanistan and Tajikistan) and Tanzania, these gems are found in remote marble-type deposits...in the south of An Phu village in the Luc Yen District of North Vietnam. One of the goals of these expeditions...the different blue spinel mining areas in the district, and to collect samples on site for the GIA reference |  | | Journal (article/letter/editorial) | | confusion among geologists and mineralogists. ‘Sapphire’ and ‘ruby’, for example, are not mineral names...gravel deposits in Myanmar (Burma), Sri Lanka, Tanzania and Madagascar. The gravels in each deposit include...of the Umba River valley in northern Tanzania and in the region of Mogok (Myanmar) are especially intriguing...(gem zoisite) diggings at Merelani in northeast Tanzania have been mined for their graphite, and massive...m of gem spinel diggings at Mahenge in central Tanzania (Figure 4). A foul-smelling organic odour, which |
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Winza, Mpwapwa District, Dodoma Region, Tanzania