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| Vn1 I I M F Y Y i l GPRlNr. 1QRA CHINA The quarterly journal ot the Lernologlcal Institute ot Amertca...2 2 Number 1 TABLE OF CONTENTS EDITORIALS 1 China Richard T. Liddicoat, Ir. 2 The Gems & Gemology...Resources of China 14 The Changma Diamond District, Mengyin, Shandong Province, China Peter C. Keller...o - d o n g 24 I ( , r Gemstone Carving in China: Winds of c h k g e Sally A . T h o m a s a n d...TECHNIQUES 35 A Gemological Study of Turquoise in China 38 The Gemological Characteristics of Chinese |
 | 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...reserved. Keywords: Trace elements; ICP-MS–LA; Corundum; Magmatic sapphires; Metamorphic sapphires 1...elements can act as the signature of a single gem-deposit as did oxygen isotope composition (Yui et al.,...Spectroscopy (LIBS). Therefore, the measurement of Mg in corundum, which is generally not obtained, may help to...investigations. 2. General setting and previous works Corundum, which consists of more than 98% of Al2O3, contains |
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| Guo ? Suzanne Y. O’Reilly William L. Griffin Corundum from basaltic terrains: a mineral inclusion approach...Abstract This paper investigates the origin of corundum megacrysts that occur in many basaltic terrains...for over 80 primary mineral inclusions within corundum megacrysts are used to gain a new insight into...of the corundum megacrysts. A wide spectrum of minerals is present as inclusions in the corundum; the most...minerals from corundum occurring in widely separated areas suggests that the corundum megacrysts in basalts |
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| of subcontinental lithospheric mantle, eastern China Yao Yu & Xisheng Xu & Xiaoming Chen Received: 2...basalts from Changle in Shandong Province, Mingxi in Fujian Province and Penglai in Hainan Province within...within the coastal area of eastern China. They are colourless, transparent to light brown–maroon, and...long. U–Pb ages of zircon megacrysts from Changle, Mingxi and Penglai are 19.2±0.7 Ma, 1.2± 0.1 Ma and 4...9.02 ±0.49, 6.83± 0.47, 4.46± 0.48 for Changle, Mingxi and Penglai, respectively, which indicates their |
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| 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- |
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| , I The Sapphires of Penglai, Hainan Island, China W h g Furui 161 A Gem-Quality Iridescent Orthoamphibole...with a certain amount of rough diamonds would deposit his rough in a bank as collateral at a declared...interest rate. He would then buy more diamonds, deposit them in the bank, and, in turn, get another low-interest...Guyana! Lesotho, as well as China. Althougl~ production statistics for China are not available! the total...countries such as South Korea and perhaps even China, and that the diamond industry can attract some |
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| 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 |
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| melt inclusions 59701 MA ABSTRACT Gem corundum (sapphire) has been mined from an ultramafic lamprophyre...troctolite precursor. These calculations suggest that corundum can form through peritectic melting of kyanite...significant advancement in our understanding of sapphire genesis and sheds light on how mantle-derived...surface. 1 ACCEPTED MANUSCRIPT Keywords: sapphire; corundum; melt inclusions; lamprophyre; liquid immiscibility;...Gulch sapphire deposit in central Montana has produced exceptional gem- SC quality corundum (sapphire) |
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| Corundum Deposits of Montana By STEPHEN E. CLABAUGH ^ GEOLOGICAL SURVEY BULLETIN 983 * .^ A description...__ Corundum-bearing dikes and associated placer deposits___.______. ______ Yogo sapphire deposit. __...setting. ______________________________________ Sapphire-bearing dike_---_-----___-_----_----_------__Sapphires...reserveS--_-_________-.-p-_ __-______--__ Missouri River sapphire deposits .-___________-____-________-_-._ Location...____________________________________ Roek Creek sapphire deposit. _ __________________________________ Location |
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| c. 1990 blue beryls were found in a secondary deposit in Mozambique which were similar to the Brazilian...anecdotal comments on a cultured pearl farm in China, remarks on non-nucleated cultured pearl growth... and a 'topaz diffusion' treatment applied to corundum is described. Pearls Non-nucleated cultured pearls...pearls A visit to a cultured pearl farm in Wuhan, China, was one of the highlights of attending a conference...conference at the Gemmological Institute of the China University of Geosciences. The cultured pearl farm (Figure |
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| Gemmological Institute, China University of Geosciences, Wuhan 430074, P.R. China ABSTRACT: The numbers...NASLAW ICE ~ .~ a 1km L--J SCALE Nephrite Jade Deposit JORDAN6 w SLASK I • D ALL UVI UM .. GRAN ITE...circulating imitations of rough emerald, ruby, sapphire, and diamond are well known. Recently, there has...diffused red corundum normally displays a patchier colour than the equivalent diffused blue corundum. This...chromium atoms into the corundum than in diffusing the iron and titanium into corundum, which is used to obtain |
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| From Exsolution to ‘Gold Sheen’: A New Variety of Corundum By Thanh Nhan Bui, Katerina Deliousi, Tanzim Khan...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, ~1.5– 2.5 cm in diameter) are from a new deposit in the Kondoa District of Tanzania. Photo by Brendan |
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| 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 |
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| Director Natural History Museum of Los Angeles County Featuring Photographs by Harold and Erica Van...Western Australia Index 141 FOREWORD Each gem deposit-whether of primary origin in the parent rocks;...impression that one is actually present in a described deposit; observing how the gem crystals grow in their birth...gallery in the Natural History Museum of Los Angeles County, entitled "Gemstones and Their Origins," which...detail, along with an example of an important gem deposit where this process has been observed. In each chapter |
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| Director Natural History Museum of Los Angeles County Featuring Photographs by Harold and Erica Van...Western Australia Index 141 FOREWORD Each gem deposit-whether of primary origin in the parent rocks;...impression that one is actually present in a described deposit; observing how the gem crystals grow in their birth...gallery in the Natural History Museum of Los Angeles County, entitled "Gemstones and Their Origins," which...detail, along with an example of an important gem deposit where this process has been observed. In each chapter |
 | Li, Jie-Ya, Zhang, Ai-Cheng, Sakamoto, Naoya, Yurimoto, Hisayoshi, Gu, Li-Xin (2020) A new occurrence of corundum in eucrite and its significance. American Mineralogist, 105 (11) 1656-1661 doi:10.2138/am-2020-7361 | Journal (article/letter/editorial) |
| 105, pages 1656–1661, 2020 A new occurrence of corundum in eucrite and its significance Jie-Ya Li1, Ai-Cheng...Nanjing 210023 China 2 CAS Center for Excellence in Comparative Planetology, Hefei 230026, China 3 Isotope...Geophysics, Chinese Academy of Sciences, Beijing 100029, China 1 Abstract The diversity of lithologies is an... In this study, we report a new occurrence of corundum in eucrite meteorite Northwest Africa (NWA) 8647...Three-dimensional petrographic observations reveal that the corundum grain occurs as a mineral inclusion in a highly |
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| 679–684 SCIENTIFIC COMMUNICATIONS THE SILVER BOW SAPPHIRE OCCURRENCE, MONTANA: EVIDENCE FOR A VOLCANIC BEDROCK...BEDROCK SOURCE FOR MONTANA’S ALLUVIAL SAPPHIRE DEPOSITS AARON L. BERGER† 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 |
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| calcite bangles resembling jadeite|Large pink sapphire with diffusioninduced star|Mid-year 2016 Myanma...sapphires. These rubies recovered from the Aappaluttoq deposit weigh 0.29–2.53 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 |
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| Bernhardt, a n d Fred M o u a w a d The Yogo Sapphire Deposit Keith A. ~ ~ c h a l u k NOTES AND NEW TECHNIQUES...KUDOS FOR "COLOR GRADING OF COLORED DIAMONDS" SAPPHIRE-BEARING ALKALI BASALTS I N NIGERIA Congratulations...two possiblc exceptions, in Nigeria and Southcrn China, but these are not well documented.)" In the Iournal...Froin our description, it is evident that the vast sapphire deposits in central Nigeria are not "a possible...to figure 6 (p. 260) in our paper: the longest corundum crystal is 1.3 cin (about 0.5 inches), not 13 |
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| NOTES AND NEW TECHNIQUES "Ti-Sapphire":Czochralski-Pulled Synthetic Pink Sapphire from Union Carbide Mary...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...1991; Kammerling et al., 1994). Yet, significant corundum deposits have also been found in southern Vietnam |
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| Ruby and Sapphire from the Southern Ural Mountains, Russia Alexander 1. Kissin Gem Corundum in Alkali...Alexander J. Kissin Primary occurrences of ruby, pink sapphire, sapphires of other colors, and spinel have been...gold mining. These include beryl, chrysol~eryl,corundum, diamond, euclase, topaz, and tourmaline. As a...referred to the region as the "Russian Brazil." Corundum from placers in the area was first reported by...specimens were relatively large (pink and blue sapphire up to 10 x 20 mm; ruby up to 10 mm) but not of |
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| - by richard w. hughes I - ,=: CJ? UBY & SAPPHIRE is a journey into one of mankind's most fascinating...than yawns is always a scarce item. But Ruby & Sapphire is just such a book-a rare combination of face...fun, the pertinent and che peculiar. Open Ruby & Sapphire and you seep into a secret world where, with each...amazing and colorful tales within. Bur Ruby & Sapphire is also 1nuch more. T he product of over 15 years...a virtual encyclopedia of the subject. Ruby & Sapphire highlights: • Side-by-side photos illustrate color |
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| 2006, 18, 441-447 OH in naturally occurring corundum ANTON BERAN* and GEORGE R. ROSSMAN Division of...have been observed in the infrared spectra of 159 corundum crystals from worldwide localities. The OH defects...defects are most prominent in blue sapphire crystals, suggesting an association of OH with redox reactions...kyanite, the absolute concentrations for OH in corundum are found to be generally 0.5 wt.ppm or lower...OH stretching region of the corundum infrared spectrum. Key-words: corundum, OH defects, nominally anhydrous |
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| WINTER 2009 PAGES 235– 312 VOLUME 45 NO. 4 Ruby-Sapphire Review Nanocut Plasma-Etched Diamonds Chrysoprase...__________________ 236 Carat Points 260 pg. 251 Ruby and Sapphire Production and Distribution: A Quarter Century...global developments that have transformed the corundum market since the early 1980s. Cutting Diffraction...forces that have reshaped the corundum market worldwide. This sapphire necklace, designed by David Webb...Webb, has approximately 700 carats of sapphire beads. The large cabochon, with a GIA origin report stating |
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| 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...has not yielded a corundum crystal large enough to be included in the list of sapphire giants discussed...discussed in the Burmese sapphire paper. But with verified occurrences of large corundums in the Transvaal perhaps...1355-4565 548 J. Gemm., 1995,24,8 o - I 400m I CHINA NEPHRITE ORE DAEILMIN ~FAULT LEGEN D ALLUV IUM |
