 | | Journal (article/letter/editorial) | | in North China: Geochemical evidence from Cenozoic continental basalts in central Shandong Zheng Xu,...University of Science and Technology of China, Hefei 230026, China a r t i c l e i n f o Article history:...subduction Craton destruction a b s t r a c t The North China Craton is one of the Archean cratons on Earth, and...geochemistry of Cenozoic continental basalts in North China. This is delineated by a combined study of whole-rock...basalts from the southeastern part of the North China Craton. The results suggest that the origin of Cenozoic |  | | Journal (article/letter/editorial) | | and Chemical Composition of Penglai Sapphire in Hainan Province, China Guang-Ya Wang 1,2 , Xiao-Yan Yu 1...Penglai School of Gemology, China University of Geosciences, Beijing 100083, China; 2009200044@cugb.edu.cn...and Mineral Resources, China University of Geosciences, Beijing 100083, China Southern Marine Science...Guangdong Laboratory (Guangzhou), Guangzhou 511458, China Key Laboratory of Deep-Earth Dynamics, Institute...Academy of Geological Sciences, Beijing 100037, China Shandong Academician Workstation of Diamond Mineralization |  | Peucat, J.J., Ruffault, P., Fritsch, E., Bouhnik-Le Coz, M., Simonet, C., Lasnier, B. (2007) Ga/Mg ratio as a new geochemical tool to differentiate magmatic from metamorphic blue sapphires. Lithos, 98 (1) 261-274 doi:10.1016/j.lithos.2007.05.001 | Journal (article/letter/editorial) | | found in alkali basalts (e.g. southeastern Asia, China, Africa) are commonly medium-rich to rich in Fe...elements can act as the signature of a single gem-deposit as did oxygen isotope composition (Yui et al.,...matter of debate. Geological settings for each ore deposit are briefly presented in the corresponding section...southeastern Asia, China, and Africa (Fig. 1, Table 2). In the Pailin alluvial deposit (Cambodia), Sutherland...l. Sam Sai (southern Laos) is also an alluvial deposit and contains dark blue and blue-green sapphires |  | | Journal (article/letter/editorial) | | and uranpyrochlore), alkali feldspar, low-Ca plagioclase (albiteoligoclase) and zircon. Rare inclusions...testable. Introduction Most of the worldâs current sapphire production is taken from recent or palaeo-alluvial...distributed in eastern Australia, Thailand and eastern China. The lack of understanding of corundum genesis and...relationship between the occurrence of alluvial sapphire deposits and the presence of basaltic rocks in...Coldham 1985; Krosch and Cooper 1990), eastern China (Keller and Wang 1986; Guo et al. 1992), the Indochina |  | | Journal (article/letter/editorial) | | of subcontinental lithospheric mantle, eastern China Yao Yu & Xisheng Xu & Xiaoming Chen Received: 2...deposits associated with Cenozoic basalts from Changle in Shandong Province, Mingxi in Fujian Province and Penglai...Hainan Province within the coastal area of eastern China. They are colourless, transparent to light brownâmaroon...16 mm long. UâPb ages of zircon megacrysts from Changle, Mingxi and Penglai are 19.2±0.7 Ma, 1.2± 0.1 Ma...megacrysts are 9.02 ±0.49, 6.83± 0.47, 4.46± 0.48 for Changle, Mingxi and Penglai, respectively, which indicates |  | 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...to product from the Mugloto Mugloto colluvial deposit, which provided clean and very high-quality red...red stones with typical sizes colluvial deposit, which provided clean and very high-quality red stones...phlogopite matrix with plagioclase (white) in phlogopite matrix(blue) with hosted plagioclase (white) and minorand...Gems Inc.Photo: (Vancouver, BC, True Canada). deposit, southwest Greenland. Courtesy North Gems Inc. |  | | Journal (article/letter/editorial) | | inclusions 59701 MA ABSTRACT Gem corundum (sapphire) has been mined from an ultramafic lamprophyre...significant advancement in our understanding of sapphire genesis and sheds light on how mantle-derived...the surface. 1 ACCEPTED MANUSCRIPT Keywords: sapphire; corundum; melt inclusions; lamprophyre; liquid...ocelli RI 1. Introduction The Yogo Gulch sapphire deposit in central Montana has produced exceptional...exceptional gem- SC quality corundum (sapphire) for more than 100 years. Discovered by gold prospector Jake |  | Giuliani, Gaston, Fallick, Anthony, Rakotondrazafy, Michel, Ohnenstetter, Daniel, Andriamamonjy, Alfred, Ralantoarison, ThĂ©ogĂšne, Rakotosamizanany, Saholy, Razanatseheno, Marie, Offant, Yohann, Garnier, Virginie, Dunaigre, Christian, Schwarz, Dietmar, Mercier, Alain, Ratrimo, Voahangy, Ralison, Bruno (2007) Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita, 42 (3) 251-270 doi:10.1007/s00126-006-0105-3 | Journal (article/letter/editorial) | | The oxygen isotopic ratios (18O/16O) of ruby and sapphire from primary deposits are a good indicator of...wide spread between â0.3 and 16.5â°. The ruby and sapphire found in placers linked to alkali basalt environments...blue sapphire, syenite for yellow, green, and blue sapphire, and skarn in marbles for blue sapphire. Keywords... Oxygen isotopes . Corundum deposits . Ruby . Sapphire Miner Deposita (2007) 42:251â270 gem quality...ratios (18O/16O) in the lattice oxygen of ruby and sapphire to provide a gemstone geological identification |  | Palke, Aaron C., Wong, Jacqueline, Verdel, Charles, Ăvila, JanaĂna N. (2018) A common origin for Thai/Cambodian rubies and blue and violet sapphires from Yogo Gulch, Montana, U.S.A.?. American Mineralogist, 103 (3) 469-479 doi:10.2138/am-2018-6164 | Journal (article/letter/editorial) | | proposed for volcanically transported ruby and sapphire deposits around the world. In this contribution...corundum ought to be used with caution. Keywords: Sapphire, ruby, Yogo Gulch, melt inclusions, corundum,...Pacific margin (eastern Australia, southeast Asia, China, eastern Russia). There are also examples in northeast...fields are generally very similar to other alluvial sapphire deposits associated with alkali basalt fields...gem-producing regions are essentially one single deposit straddling the border 469 Brought to you by | |  | | Journal (issue) | | INTO CHINA Site of ICA Congress 2009 13 ICA CONGRESS 2009 Panyu, CHINA CONTENTS 5 Foreword 6 ICA...ICA News 10 Color in China 10 Jewelry Development in Panyu â A Story of the Twin Cities 12 The National...and Their Standardization in China 20 Colored Stone Deposits in China 24 Factors Affecting Chinaâs...26 Mining A Glimpse of the New Fine Emerald Deposit at Xinjiangâs Davdar Mine Education 32...13th ICA Congress that is being held in Panyu, China this year. Despite the global economic slowdown |  | | Report (volume) | | associated placer deposits___.______. ______ Yogo sapphire deposit. _________________________________________...setting. ______________________________________ Sapphire-bearing dike_---_-----___-_----_----_------__Sapphires...reserveS--_-_________-.-p-_ __-______--__ Missouri River sapphire deposits .-___________-____-________-_-._ Location...____________________________________ Roek Creek sapphire deposit. _ __________________________________ Location..._________.___.._..___-._-Dry Cotton wood Creek sapphire deposit---... ____________________ Location __.._ |  | | Journal (issue) | | Mananjary, on the island's east coast. Both ruby and sapphire were among the stones Professor Smith listed for...(1992)describe an unusual type of m~~lti-colored sapphire from a locality called Ianlzarolza~southwest of...the Andranondambo (also called Andranondamtso) deposit in southern Madagascar has turned out to be a significant...production. The much-talked-about Andranondambo sapphire deposit is not a recent discoveryl although fine-quality... and the ring is set with a 54 ct pear-shaped sapphire. Courtesy of Mozzawad 1ewelers. Hibon reported |  | | Journal (issue) | | calcite bangles resembling jadeite|Large pink sapphire with diffusioninduced star|Mid-year 2016 Myanma...sapphires. These rubies recovered from the Aappaluttoq deposit weigh 0.29â2.53 ct and were characterized for an... ARTICLES Feature Articles 294 Ruby and Pink Sapphire from Aappaluttoq, Greenland By Christopher P....GemeWizard Ltd., Ramat Gan, Israel; Guanghai Shi, China University of Geosciences, Beijing; James E. Shigley...DK9000, released by DiKai Industrial (Shenzhen, China) in April 2016, is a pen-style thermoelectric probe |  | | Journal (issue) | | necessarily of the publishers. Cover Picture Burmese sapphire crystal weighing 502 ct, unearthed in 1994 at...Gwebin, in Burma's Mogok Stone Tract. (See Burmese sapphire giants, p. 551) Photo by UKhinMg Win ISSN: 1355-4565...be included in the list of sapphire giants discussed in the Burmese sapphire paper. But with verified occurrences...1355-4565 548 J. Gemm., 1995,24,8 o - I 400m I CHINA NEPHRITE ORE DAEILMIN ~FAULT LEGEN D ALLUV IUM...of Korea J. Gemm., 1995,24, 8 551 Burmese sapphire giants Richard W. Hughes* and U Hla Win** * 4894 |  | | Journal (article/letter/editorial) | | 679â684 SCIENTIFIC COMMUNICATIONS THE SILVER BOW SAPPHIRE OCCURRENCE, MONTANA: EVIDENCE FOR A VOLCANIC BEDROCK...BEDROCK SOURCE FOR MONTANAâS ALLUVIAL SAPPHIRE DEPOSITS AARON L. BERGERâ Department of Geosciences, Virginia...The first confirmed bedrock source of alluvial sapphire deposits in southwest Montana has been found 9...source rock of the Silver Bow occurrence is a sapphire-bearing felsic lapilli tuff of the Eocene Lowland...of known primary sapphire deposits and may represent a previously unrecognized deposit type. Mass wasting |  | | Journal (issue) | | necessarily of the publishers. Cover Picture Faceted sapphire from Cyangugu district, SW Rwanda. See Investigations...and a higher reading for the diamond/synthetic sapphire doublet. The higher meter reading for paste results...Is the higher reading for the diamond/synthetic sapphire doublet due to deterioration of the adhesive?...Synthetic spinel Garnet Chrysoberyl Sapphire Synthetic sapphire Anglesite Scheelite YAG Carat weight...2.68 Synthetic rutile 2.42 Diamond/ synthetic sapphire doublet t § Members having gained their Diploma |  | | Book | | Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus SrâPb...WolfgangHofmeister PetrogenesisoftheSnezhnoeRubyDeposit,CentralPamir Reprinted from: Minerals 2020, 10...Professor of Economic Geology at CODES (Centre of Ore Deposit and Earth Sciences), University of Tasmania, Hobart...mineral deposits in Canada, Australia, New Zealand, China and many parts of SE Asia (Vietnam, Laos, Cambodia...Sydney, NSW 2010, Australia CODESâCentre of Ore Deposit and Earth Sciences, University of Tasmania, Hobart |  | | Journal (article/letter/editorial) | | pp. 875-880 GEOLOGY AND ORIGIN OF THE YOGO SAPPHIRE DEPOSIT, MONTANA ARTHUR H. BROWNLOW Departmentof...millioncaratsvaluedin the rough The Yogo sapphire deposit is located in central Montanaapproximately72...454) describedthe depositas the most valuable gem deposit in the United States.At the presenttime it is still...occurrence,properties,and possibleoriginsof the Yogo sapphire. Mining history In 1895 placerminingfor goldalongYogoCreek...1929. There was little mining activity at the deposit from 1929 until 1980. Several unsuccessful at- |  | Sutherland, Lin, Graham, Ian, Yaxley, Gregory, Armstrong, Richard, Giuliani, Gaston, Hoskin, Paul, Nechaev, Victor, Woodhead, Jon (2016) Major zircon megacryst suites of the Indo-Pacific lithospheric margin (ZIP) and their petrogenetic and regional implications. Mineralogy and Petrology, 110 (2) 399-420 doi:10.1007/s00710-015-0421-3 | Journal (article/letter/editorial) | | without marked Eu depletion, indicating little plagioclase fractionation in source melts. Key elements and...Introduction Large gem-quality zircons commonly accompany sapphire ± ruby in many placer and volcanoclastic deposits...high Th/ U ratios (e.g. zircon groups in a North China granulitic xenolith suite, Liu et al. 2004). Igneous...formed in magmas where feldspar, particularly plagioclase, crystallized tend to develop negative Eu anomalies...while those grown in plagioclase-poor systems or at pressures above plagioclase stability lack noticeable |  | | Journal (issue) | | Volume 36 / No. 8 / 2019 Sapphire Intaglio from Pompeii Chinese Synthetic Diamonds Trapiche Rubies...from Pompeii, Italy, proved to be a basaltic-type sapphire (see article on pp. 710â725 of this issue) and...ash. ARTICLES Gemmological Analysis of a Roman Sapphire Intaglio and Its Possible Origin 710 By Michael...Israel; Andy H. Shen, China University of Geosciences, Wuhan; Guanghai Shi, China University of Geosciences...Excellence in Research for Australia (ERA) Journal List; China National Knowledge Infrastructure (CNKI Scholar); |  | | Journal (issue) | | Establishing the Geographic Origin of Diamonds Sapphire from Muling, China The History of Pigments Sourced from...269 The Geographic Origin of Diamonds, Sapphire from China, and Pigments Sourced from Gem Materials...individual diamond. 290 Sapphire Beneath the Rich Black Soil of Muling, Northeastern China Yimiao Liu and Ren...analysis of blue and fancycolor sapphire from the agricultural area of Muling, China. p. 302 318 Gems on Canvas:...color of pink spinel reportedly from the Kuh-iLal deposit in the Pamir Mountains of Tajikistan. p. 330 |  | | Journal (issue) | | 113 111 Summer Reading: Diamond Research, Yogo Sapphire, and Byzantine Garnet Duncan Pay FEATURE ARTICLES...of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected...Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade...characteristics of this naturally vibrant blue sapphire. CHARTS 202 Features of Synthetic Diamonds Sally...natural âhorse conchâ pearls âą âGolden sheenâ star sapphire âą Cabochons from Crassostrea virginica shell âą |  | | Journal (issue) | | NOTES AND NEW TECHNIQUES "Ti-Sapphire":Czochralski-Pulled Synthetic Pink Sapphire from Union Carbide Mary...fine-grained gabbroic roclzs mainly consisting of plagioclase and p y r o ~ e n e which )~ extend froin the...Sketching Detecting Treated Emerald, Ruby & Sapphire Identifying Challenging Synthetics Blue Gem Alternatives...market since the late 1980s. Visits to two of the sapphire-producing areas-Phan Thiet and Di Linh-confirmed...168-186 Gemotogical Institute of Amaica Vietnam Sapphire 1 n recent years, considerable attention has |  | | Journal (issue) | | Origin of Montanaâs Alluvial Sapphires The Grand Sapphire: Provenance and Properties In Search of Australian...properties. 392 The Grand Sapphire of Louis XIV and the âRuspoliâ Sapphire: Historical and Gemological...characterization reveal the true story of this 135.74 ct blue sapphire from the French crown jewels. NOTES AND NEW TECHNIQUES...Colombian quartz âą Violetish blue spinel in yellow sapphire âą Stars in ParaĂba tourmaline 446 Gem News International...natural-color bluish green chalcedony âą Rubies from new deposit in Madagascar âą Plastic imitation of golden coral |  | | Journal (issue) | | GemeWizard Ltd., Ramat Gan, Israel; Guanghai Shi, China University of Geosciences, Beijing; James E. Shigley...Kondoa District, Tanzania A historically important deposit of chrysoprase and prase opal in Tanzania is located...and polished material (e.g. Figure 7) from a new deposit in Tanzania was shown by Werner Radl (Mawingu Gems...(here, ~1.5â 2.5 cm in diameter) are from a new deposit in the Kondoa District of Tanzania. Photo by Brendan...comparison with the gem corundum from Kenyaâs Dusi deposit (near Garba Tula; see, e.g., Simonet et al., 2004) |
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