 | | Journal (issue) | | Protected Area of the Lufwanyama district in the Copperbelt Province of Zambia. The Ndola region consists...the meta-sedimentary Muva supergroup (biotite-phlogopite schist around talcmagnetite schist and tremo...pegmatite-schist contact which cross-cuts the biotite-phlogopite schist that developed as a result of metasomatic...2002. The Santa Terezinha-Campos Verdes emerald district, central Brazil: structural and Sm-Nd data to...assemblages consisting of spinel, forsterite, phlogopite and enstatite. In turn and in places, these have |  | Ngoc Khoi, Nguyen, Hauzenberger, Christoph A., Anh Tuan, Duong, Häger, Tobias, Van Nam, Nguyen, Thuy Duong, Nguyen (2016) Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) Neues Jahrbuch für Mineralogie - Abhandlungen Journal of Mineralogy and Geochemistry, 193 (2) 161-181 doi:10.1127/njma/2016/0300 | Journal (article/letter/editorial) | | range, Ailao Shan–Red River shear zone (North Vietnam) Nguyen Ngoc Khoi, Christoph A. Hauzenberger, Duong...typically associated with marbles in northern Vietnam. Relatively little attention has been paid to corundum...range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish...their high gem-quality corundum deposits (Fig. 1). Vietnam geologists found corundum and spinel for the first...first time in the An Phu marble, Luc Yen district, in 1983. At the beginning of 1987, Geological Expedition |  | Giuliani, Gaston, Fallick, Anthony E., Boyce, Adrian J., Pardieu, Vincent, Pham, Van Long (2017) Pink and Red Spinels In Marble: Trace Elements, Oxygen Isotopes, and Sources. The Canadian Mineralogist, 55 (4) 743-761 doi:10.3749/canmin.1700009 | Journal (article/letter/editorial) | | Research and Identification of Vietnam, 91 Dinh Tien Hoang Hanoi, Vietnam ABSTRACT The oxygen isotopic...18.5% for spinels from An Phu and Cong Troi in Vietnam, and Namya from Myanmar; and (3) between 19.0 and...Pamreso in Kenya, Mogok in Myanmar, and An Phu in Vietnam. The variation in the d18O values for most of the...of the spinel mine of Cong Troi, Luc Yen area, Vietnam. (B) Spinel (Sp) associated with clinohumite (Chu)...quarries, Vietnam. (C) Crystals of red spinel around 1 cm across in a marble from Luc Yen, Vietnam. (D) Pale |  | Wu, Jinlin, Sun, Xueying, Ma, Hong, Ning, Peiying, Tang, Na, Ding, Ting, Li, Huihuang, Zhang, Tianyang, Ma, Ying (2023) Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color. Minerals, 13 (2) 226 doi:10.3390/min13020226 | Journal (article/letter/editorial) | | identified a number of inclusions, including dolomite, phlogopite, and forsterite in Tanzanian spinel and magnesite...Sri Lanka, and Vietnam) [10]. Red spinel from Myanmar and cobalt blue spinel from Vietnam are particularly...purple spinels in Afghanistan and new deposits in Vietnam [17–20], purple spinel was often marginalized commercially...Sri Lanka, and Vietnam) [10]. Red spinel from Myanmar and cobalt blue spinel from Vietnam are particularly...purple spinels in Afghanistan and new deposits in Vietnam Neoproterozoic metamorphic Mozambique Belt [2] |  | | Journal (issue) | | Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam Le Thi-Thu Huong, Wolfgang Hofmeister...quartz • Indian scapolite • Spinel from northern Vietnam • Gem zektzerite • “Coral Sea” agate • Dendritic...(2009b) Les nouveaux grenats démantoïdes d’Ambanja, Province d’Antsiranana, Madagascar. Le Règne Minéral, Vol...alkali basalt at Muling in the northeast Chinese province of Heilongjiang. Rough and cut samples were characterized...more than 300,000 in the northeastern Chinese province of Heilongjiang (figure 2). It See end of article |  | | Journal (issue) | | Mahenge, Tanzania In Search of Cobalt Blue Spinel in Vietnam Spinel Inclusions – An Exercise in Aesthetics Spinel...primary deposits are found in Tajikistan, Myanmar, Vietnam and Tanzania (Yavorskyy and Hughes, 2010; Giuliani...Tajikistan with the historical Kuh-i-Lal source; Vietnam with the Luc Yen mining area; and Myanmar with...2B. Red spinel in marble, Luc Yen mining district, Vietnam. (Photo: V. Pardieu) Image 2D. Cut and rough...white sugar-like marble, Luc Yen mining area, Vietnam. (Photo: V. Pardieu) 16 InColor Summer 2019 InColorMagazine |  | | Journal (issue) | | the Tan Huong–Truc Lau Area, Yen Bai Province, Northern Vietnam Nguyen Ngoc Khoi, Chakkaphan Sutthirat...Nhung Although not as well known as the Luc Yen district, this area is an important source of ruby and...Afghanistan • Ammonite from Madagascar • Aquamarine from Vietnam • Chalcedony from Peru • Afghan emerald mining...characteristics of r uby and sapphire from Yen Ba i Province, in nor thern V ietnam. There is an ar ticle by...THE TAN HUONG–TRUC LAU AREA, YEN BAI PROVINCE, NORTHERN VIETNAM Nguyen Ngoc Khoi, Chakkaphan Sutthirat |  | | Journal (issue) | | 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...Heat-Treated Pink-to-Red Spinel from Luc Yen, Vietnam 312 348 By Chawalit Chankhantha, Ratthaphon...Belley, P. & Palke, A. 2021. Purple gem spinel from Vietnam and Afghanistan: Comparison of trace element chemistry...(Sherafat et al. 2007), which is located in Yazd Province in the centre of Iran, approximately 50 km north-east |  | | Journal (issue) | | Corona from the Tan Huong–Truc Lau Area in Northern Vietnam Nguyen Ngoc Khoi, Christoph A. Hauzenberger, Chakkaphan...study on corundum with spinel corona from northern Vietnam. The authors explain the genesis of the corona...principality within the Holy Roman Empire and today a province that surrounds Berlin. Frederick III (later Frederick...seized the territory of East Prussia as a Russian province (including Königsberg, renamed Kaliningrad in...spinels from a new deposit at Lang Chap (Tan Huong-Truc Lau), Vietnam. Journal of Gemmology, Vol. 3, |  | | Journal (issue) | | Fe-Mg-chromite Calcite Magnesite Phlogopite Calcite K-feldspar Phlogopite Perovskite Native Fe Titanite...Amphibole Dolomite Zircon Staurolite Apatite Phlogopite Zircon Eskolaite Yimengite Moissanite Sr-titanate...Penglai in Hainan Island and Mingxi in Fujian Province (all along the east coast of China) and described...been reported from the Ailaoshan area in Yunnan Province and the Xinjiang Uyghur Autonomous Region with...worked on a geological survey of Heilongjiang Province, published studies about the geological characteristics |  | | Journal (issue) | | production. p. 229 228 Purple Gem Spinel from Vietnam and Afghanistan: Comparison of Trace Element Chemistry...spectra of two purple gem spinels from Luc Yen, Vietnam, and Badakhshan, Afghanistan. Their study presents...International Gemmological Conference, Hanoi, Vietnam, pp. 64–66. CIBJO, The World Jewellery Confederation...N., Lawanwong K., Kitdee N., Chodhry D. (2020) Vietnam: Shell nuclei, pearl hatcheries, and pearl farming...PM FEATURE ARTICLES PURPLE GEM SPINEL FROM VIETNAM AND AFGHANISTAN: COMPARISON OF TRACE ELEMENT CHEMISTRY |  | | Journal (issue) | | fissures in sapphire • Quarterly Crystal: Topaz with phlogopite 70 p. 72 Gem News International Virtual report...applied to turquoise sourced from China’s Hubei Province. Next, Che Shen and coauthors provide a mathematical...source of commercial turquoise in China’s Hubei Province, where mass production has been ongoing for several...many residents of Shiyan City in China’s Hubei Province owned turquoise, though few were conscious of...decorative materials in the 1980s in Yun County, Hubei Province. Photos by Ling Liu. RESIN-FILLED TURQUOISE |  | | Journal (issue) | | and La Pita mines. This is the largest emerald district in Colombia, and it is the most productive and...Peñas Blancas, located in the famous Muzo mining district. This mine has rarely been mentioned in gemmological...significant impact on the development of the entire Muzo district, and eventually Peñas Blancas may be partially...“including recently discovered deposits in Boyacá Province” (referring to Peñas Blancas). The government...occur in downtown Bogotá in the famous emerald district of Avenida Jiminez and 7th Avenue. Nevertheless |  | | Book | | MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...Administered Tribal Areas and North West Frontier Province. Ilmenite crystal clusters to 12 cm across have...of rutile (Weerth, 2004). Tonniq Valley, Skardu district, Gilgit-Baltistan [Northern Areas]. Beginning...hematite. Zagi [Zegi] Mountain, Warsak district, North West Frontier Province. Surface diggings worked by local...to 6 cm (2005: 120). Los Remedios mine, Taxco district, Taxco, Guerrero. Ilvaite occurs in the wallrock |  | | Conference Proceedings | | (2009), Interlaken, Switzerland (2011); Hanoi, Vietnam, (2013); Vilnius, Lithuania (2015); Windhoek, Namibia...Switzerland, Sweden, Tanzania, Thailand, U.S.A., Vietnam and Zimbabwe. During the 20th IGC, which was held...from a new occurrence from Paramathi in Karur district of Tamil Nadu, India. 12:00 – 12:20 Wilawan...Xianyu: Turquoise from Zhushan county in Hubei province of China Elizabeth Su: The vivid world of jadeite...diamonds. Some call them "mixed-habit growth diamonds" (Lang et al., 2004; Howell et al., 2013); a more commercial |
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