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| 2008 PAGES 1– 106 Paraíba-type Tourmaline from Mozambique History of Diamond Treatments VOLUME 44 NO. 1...Copper-Bearing (Paraíba-type) Tourmaline from Mozambique Brendan M. Laurs, J. C. (Hanco) Zwaan, Christopher... COPPER-BEARING (PARAÍBA-TYPE) TOURMALINE FROM MOZAMBIQUE Brendan M. Laurs, J. C. (Hanco) Zwaan, Christopher...Alexander U. Falster Copper-bearing tourmaline from Mozambique was first recovered in 2001, but its Cu content...until 2003, and it was not widely sold with its Mozambique origin disclosed until 2005. It has been mined |
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| page 14 In this issue … Mineral of the month: Elbaite ........... p. 2 Program: Tourmalines of Maine...EFMLS: Annual convention ................ p. 20 Elbaite Source: Smithsonian Institution. Upcoming events...21 Photo: Chip Clark. Mineral of the Month Elbaite Happy St. Patrick’s Day! by Sue Marcus What’s...Watermelon tourmaline is a particular, informal form of elbaite, our March Mineral of the Month. Northern Virginia...they see elbaite in their mind’s eye, usually as a single red-pink or green crystal. Elbaite is unusual |
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| Paraiba Tourmaline from Brazil – The Neon-Blue Burn Mozambique Paraiba Tourmaline Deposits – An Update Paraiba...Madagascar, along with rubies in Greenland and Mozambique. Miners such as Fura, which just acquired Mustang...with emerald and ruby assets in Colombia and Mozambique, respectively, announced recently that it has...has acquired nine ruby assets in the Mozambique. Once the transaction is completed, Fura will hold the...the largest ruby land package in Mozambique with 1,104 square kilometers. Fura acquired nine ruby assets |
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| Brazil and Cu-bearing tourmalines from Nigeria and Mozambique; and (2) to identify the likely source of Li...values of Cu-bearing tourmaline from Nigeria and Mozambique range from 30.5% to 22.7% and 20.8% to 19.1%...values of Cu-bearing tourmaline from Nigeria and Mozambique (+31.5% to +46.8%). Nevertheless, Cu-bearing...from Nigeria, and Moz1 and Moz2 are from Mavuco, Mozambique. Polished grain mounts of each sample were...of Rio Grande do Norte (Shigley et al., 2001), Mozambique (Wentzell, 2004; Laurs et al., 2008) and Nigeria |
 | Ludwig, T., Marschall, H. R., Pogge von Strandmann, P. A. E., Shabaga, B. M., Fayek, M., Hawthorne, F. C. (2011) A secondary ion mass spectrometry (SIMS) re-evaluation of B and Li isotopic compositions of Cu-bearing elbaite from three global localities. Mineralogical Magazine, 75 (4) 2485-2494 doi:10.1180/minmag.2011.075.4.2485 | Journal (article/letter/editorial) |
| of B and Li isotopic compositions of Cu-bearing elbaite from three global localities T. LUDWIG1,*, H. R...Accepted 13 June 2011] ABSTR ACT Cu-bearing elbaite from Paraı́ba (Brazil) is a highly-prized gem tourmaline...Specimens of similar quality from localities in Mozambique and Nigeria are being sold, and reliable provenance...present Li and B isotope analyses of Cu-bearing elbaite from all three localities and demonstrate the suitability...LA-ICP-MS Introduction TOURMALINE close to the elbaite endmember composition typically occurs in pegmatite |
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| green tourmaline 654 Gem Notes Apatite from Mozambique| Chondrodite from Tanzania| Purple garnets from...bisbeeite from the DRC| Purple tourmaline from Mozambique|Tourmaline slices from Myanmar|Wurtzite from...Jeff White from rough material that was mined in Mozambique; see Gem Note on pp. 656–658. Photo by Jeff White...653 Gem Notes COLOURED STONES Apatite from Mozambique In January 2014, gem dealer Dudley Blauwet (Dudley...African supplier indicated was from Nhamatanda, Mozambique. In July 2014, cutting of six pieces weighing |
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| typically chemically zoned (e.g. from schorl to elbaite) and record the chemical and isotopic evolution...TOURMALINE Gem tourmaline is commonly close to elbaite in composition and occurs in pegmatite dikes as...0.2 g), whereas similarly colored stones from Mozambique or Nigeria may sell for a fraction of that price...challenged to develop effective provenance tools. Elbaite major element compositions are variable, and all...Paraíba tourmaline from Paraíbatype tourmaline from Mozambique and Nigeria, but the grains show significant |
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| Explores the vivid “canary” yellow elbaite from the Lundazi District of eastern Zambia, the most important...from Myanmar • Cu-bearing tourmaline mines in Mozambique • New Cu-bearing tourmaline from Nigeria • Synthetic...Tanzanian bush at Tunduru, spitting distance from Mozambique, on the Muhuwesi River. I’m haggling over a parcel...Copper-bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting by LA-ICP-MS” (Spring...source of yellow gem elbaite is the Canary mining area in the Lundazi District of eastern Zambia. The |
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| Namibia|Tourmaline from Masisi, DRC|Yellow tourmaline from Mavuco, Mozambique|Tremolite from Tanzania|Tsavorite from Ethiopia|Black...minerals. The mining area is situated in the Kyaukme District of northern Shan State, approximately 18 km southeast...deposits (i.e. elbaite from the Legyi and Kyauktalon pegmatites) and secondary deposits (elbaite and dravite)...ppm) than Ca (930 to 3,080 ppm), consistent with elbaite. The possible presence of rossmanite was not considered...both located in the Masisi region of North Kivu Province. Although Hashmi has not visited the mines, in |
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| tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite. 42 The Role of Silicon...etching, in quartz crystals from India’s Jalgaon District. NOTES AND NEW TECHNIQUES 82 Characteristics...copper-bearing tourmaline on the market today is elbaite, but some is undoubtedly another tourmaline species:...under long-wave ultraviolet light than cuprian elbaite due to high concentration of rare earth elements...were imported from modernday Angola, Congo, and Mozambique to fill the needs of both industries. Much like |
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| in a Purple Spinel from Tanzania | Separating Elbaite from Liddicoatite Paraíbatype Tourmaline | Gemquality...mined from serpentinite-hosted deposits in Kerman Province in south-east Iran for the past two decades. A...by Brad Payne. ARTICLES Demantoid from Kerman Province, South-east Iran: A Mineralogical and Gemmological...chemistry of (111) twin boundaries in Separating Elbaite from Liddicoatite Paraíba-type Tourmaline Paraíba-type...tourmaline consists of elbaite (and also fluor-elbaite) from Brazil, Nigeria and Mozambique, but it is also |
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| treatment and lowtemperature heat treatment of Mozambique ruby|ICGL Newsletter|Microcrystalline silica...quartz inclusions|Glass imitations of Cu-bearing Mozambique tourmaline|Quartz imitation of star sapphire|Chromiumdiffused...low-temperature treatment. Experiments were performed on Mozambique ruby in collaboration with heat treaters in Sri...gia-news-research-low-temperature-heat-treatment-mozambique-ruby. GIA Laboratory Alert for Diamond Colour...faceted stones. Low-Temperature Heat Treatment of Mozambique Ruby In April 2015, the GIA Laboratory posted |
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| no. 32510; and (8) a 13.94 cuprian elbaite tourmaline from Mozambique, courtesy of Pala International and...instrumentation such as LA-ICPMS—once primarily the province of academia—became a fixture in many gemological...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...start operations at the Kagem mine in the Kafubu District, historically Zambia’s largest source of emeralds...ultimately decided in eBay’s favor when the U.S. District Court of New York determined that the burden of |
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| News International Tucson 2012 • Aquamarine from Mozambique • Azurite in granitic rock from Pakistan • Cat’s-eye...(1945) and Rolff (1946) in the Borborema Pegmatitic Province. In 2006, a team led by one of the present authors...Belt in the northern segment of the Borborema Province, northeastern Brazil. The emerald deposit is located...pegmatites comprise the northern part of the Borborema Province, which is known for rareelement mineralization...those encountered in emeralds from the Itabira District of Minas Gerais (compare Hänni et al., 1987; Souza |
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| mountain of gemstone rings’ in Thailand's Chanthaburi Province, an international centre for coloured gemstones...Gems Q & © @ & Cherry Topaz Flamingo Topaz Mozambique Garnet Mulberry Topaz Kunzite Pink Sdiptive...gemstone deposits are still being discovered (Mozambique Paraiba Tourmaline) and old deposits can start...Alexandrite Amethyst MOZAMBIQUE Apatite Aquamarine Cuprian Tourmaline Indicolite Mozambique Garnet Paraiba...Sunstone Pyralspites Almandine Mozambique Garnet Pyrope Mozambique Garnet (Pyrope and Almandine) Rhodolite |
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| Update on rubies and Cu-bearing tourmaline from Mozambique • Sodalite from Afghanistan • Pseudo-chatoyancy...(Atkinson and Kothavala, 1983). Although the Kashmir district has been at the center of a hostile border dispute...10). Thailand’s ruby production, mainly in Trat Province, was sporadic through the early years of the 20th...million carats of ruby were mined from the Luc Yen district, north of Hanoi. Described as “Burmese color,”...Mingxi in Fujian Province (Keller and Keller, 1986; Guo, 1992) and Changle in Shandong Province is comparable |
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| from a new occurrence from Paramathi in Karur district of Tamil Nadu, India. 12:00 – 12:20 Wilawan...heat treatment of rubies and pink sapphires from Mozambique and Greenland. 15:00 – 15:20 Sutas Singbamroong...Xianyu: Turquoise from Zhushan county in Hubei province of China Elizabeth Su: The vivid world of jadeite...and with ruby formation in marbles along the Mozambique Mobile Belt in East Africa. Based on our research...the formation of corundum deposits along the Mozambique belt. Miner. Deposita, 52 (5), 641-649. Sutherland |
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| Brazil | Emerald and Green Beryl from Shaanxi Province, China | Unusual Colour-zoned Emerald | ‘Star...tional. Emerald and Green Beryl from Shaanxi Province, China In China, emeralds have been mined from...two deposits: (1) Malipo (or Dyakou) in Yunnan Province, since the late 1980s (Hu & Lu 2019); and (2)...the Qinling Mountains in Zhen’an County, Shaanxi Province, where they are associated with a W-Be deposit...Beryl/emerald crystals from a new deposit in Shaanxi Province are shown embedded in their host rocks. (b) This |
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| crystal within a crystal • Tourmaline from Muva, Mozambique • Inclusions in aquamarine, rose quartz, scapolite...specimens from other localities (e.g., Brazil, Mozambique, Nigeria, Arizona, and Italy) are also characterized...the granitic pegmatite at Nativo, Alto Ligonha, Mozambique. Neues Jahrbuch für Mineralogie, Abhandlungen...DeGhionno D.G., Koivula J.I. (1996) Opal from Shewa Province, Ethiopia. Gems & Gemology, Vol. 32, No. 2, pp...rare borate mineral named after the Johachido district, North Korea, which is its type locality. Investigations |
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| whether Paraiba from Brazil or Paraiba-type from Mozambique and Nigeria, blue green lagoon from Namibia and...them. Mong Hsu was located in the Shan state, a province in Myanmar that had strong cultural and trade...from Andilamena (and later from the Montepuez in Mozambique) into very attractive faceted stones. This material...this issue. Discoveries in Winza (Tanzania) and Mozambique As in Myanmar in 2007, monks were protesting...the Mugloto mining pit at MRM near Montepuez in Mozambique. There, rubies are found in gravel under 6 to |
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| carat, unheated, Paraíba-Type Tourmaline from Mozambique – the “Jena Blue” • An amazing Fire Opal weighing...100+ carat flawless Paraíba-Type Tourmaline from Mozambique believed to be the largest UNHEATED Paraíba-Type...Rhodochrosite - 8.65 Cts. Pasto Bueno, Pampas District Pallasca Province Áncash, Peru This nearly 9 carat Rhodochrosite...- 2.02 Cts. Sweet Home Mine, Mount Bross Alma District, Park Co. Colorado, USA At just over 2 carats...- 7.94 Cts. Sweet Home Mine, Mount Bross Alma District, Park Co. Colorado, USA Out of the famous Sweet |
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| Fisheries Institute of Zhanjiang, in Guangdong Province. Typically these pearls, which were cultured using...such as the one shown here in Zhuji, Zhejiang Province. Photo by Valerie Power. the fact their color...established a retail store in Tokyo’s premier shopping district, Ginza. The first overseas Mikimoto store opened...material. I n 2006, new finds of copper-bearing elbaite tourmaline were made at two locations in Paraíba...and green. The Glorious mine tourmalines had an elbaite composition, and most samples had Cu >Mn, as in |
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| Photomicrograph by C. Williams; image width 4 mm. Province, southern Vietnam, the authors found several fractured...ct free-form cabochon of augite from Dong Nai Province, Vietnam, appears (a) semi-transparent dark brown...Implication for origins of a ‘diffuse igneous province’. Journal of Petrology, 39(3), 369–395, https://doi...the Adelaide or Red Lead mines in Dundas, Zeehan District). The following properties were recorded: colour—orange;...marblehosted deposit at Yuanjiang in south-central Yunnan Province, China, that was of particular interest because |
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| What’s New sold as natural in mining areas in Mozambique, plastic imitation ‘play-of-colour opal’, californite...setting of coloured gemstone deposits in the Mozambique Belt of Kenya—Preliminary considerations. Proceedings...green/brown dravite from the Commander mine, Simanjiro District, north-eastern Tanzania. A crystal fragment that...Gem Notes: Tourmaline (dravite) from Simanjiro District, Tanzania. Journal of Gemmology, 35(6), 481-482...discovery of sapphires in the Chila area of Tigray Province in late 2016 (Laurs, 2017; Vertriest et al., 2017) |
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| Protected Area of the Lufwanyama district in the Copperbelt Province of Zambia. The Ndola region consists...2002. The Santa Terezinha-Campos Verdes emerald district, central Brazil: structural and Sm-Nd data to...104° 34' 83" E), in the northern part of Yen Bai Province (Figure 2) and was discovered around April 2010...northern Yen Bai province (Figure 2), the Chay River runs (NNW-SSE) through the Luc Yen district; primary and...sapphire from the Tan Huong-Truc Lau area, Yen Bai province, northern Vietnam. Gems & Gemol., 47(3), 182–95 |
