 | | 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...reserved. Keywords: Trace elements; ICP-MSâLA; 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 |  | | Journal (article/letter/editorial) | | 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 |  | | Journal (article/letter/editorial) | | Guo ? Suzanne Y. OâReilly 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 |  | | 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) | | eastern Australia, far eastern Russia, eastern China, Laos, Vietnam, Thailand, Rwanda, Cameroon, Nigeria...alexandrites as special cases), clinohumite, cordierite, corundum, danburite, diopside, ekanite (radioactive and...pallasite meteorites, gem benitoite from San Benito County California, and Colombian emeralds (for whose genesis...confusion among geologists and mineralogists. âSapphireâ and ârubyâ, for example, are not mineral names...all; they are colour varieties of the mineral corundum when it is sufficiently transparent. In similar |  | | 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 19.2Âą0.7 Ma, 1.2Âą 0.1 Ma...megacrysts are 9.02 Âą0.49, 6.83Âą 0.47, 4.46Âą 0.48 for Changle, Mingxi and Penglai, respectively, which indicates |  | Giuliani, Gaston, Fallick, Anthony, Rakotondrazafy, Michel, Ohnenstetter, Daniel, Andriamamonjy, Alfred, Ralantoarison, ThĂŠogène, 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) | | 3 ARTICLE Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological...Abstract The oxygen isotopic composition of gem corundum was measured from 22 deposits and occurrenEditorial...geological identification and characterization. Primary corundum deposits in Madagascar are hosted in magmatic...deposits, provoked in situ transformation of the corundum host rocks with the formation of metasomatites...The oxygen isotopic ratios (18O/16O) of ruby and sapphire from primary deposits are a good indicator 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) | | Abstract: Corundum is not uncommon on Earth but the gem varieties of ruby and sapphire are relatively...relatively rare. Gem corundum deposits are classified as primary and secondary deposits. Primary deposits contain...contain corundum either in the rocks where it crystallized or as xenocrysts and xenoliths carried by magmas...the Earthâs surface. Classification systems for corundum deposits are based on different mineralogical...is the red gem variety of the mineral corundum. The name corundum was introduced in the early 19th century |  | | 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...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 |  | | Journal (article/letter/editorial) | | 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) |  | 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...Yogo sapphires suggest a common origin for gem corundum from both deposits. Specifically, we advance a...lamprophyre or basalts that transported the gem corundum to the surface partially melted Al-rich lower...to the surface. The similarities in these gem corundum deposits suggests that the partial melting, non-accidental...previously realized. Importantly, in both cases the gem corundum has an ostensibly âmetamorphicâ trace element |  | | Journal (issue) | | 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 |  | | 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 |  | | Report (volume) | | 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 |  | | 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) | | Mananjary, on the island's east coast. Both ruby and sapphire were among the stones Professor Smith listed for...onto the international gem marlzet (figure1). Corundum occurrences i n Madagascar have been reported...(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 |  | | 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) | | From Exsolution to âGold Sheenâ: 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, ~1.5â 2.5 cm in diameter) are from a new deposit in the Kondoa District of Tanzania. Photo by Brendan |  | | Journal (issue) | | (7) 2.14 ct blue sapphire, (8) 23.18 ct blue spinel, (9) 4.82 ct purple sapphire, (10) 5.32 ct ParaĂba...1.15 ct purplepink sapphire, (16) 5.54 ct spessartine, (17) 8.04 ct orange sapphire, and (18) 3.48 ct...the South Seas, and myriad shapes and colors from China. And where would we be without the process of incorporating...Lanka, India, Afghanistan, Pakistan, Russia, and China), and Australia. The major sources for diamonds...Cultured pearls from French Polynesia, Australia, and China became increasingly important, as production from |  | | Journal (issue) | | 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 |  | | Book | | - 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 |  | | Journal (issue) | | a collection of chrysoberyl samples from these sapphire placer deposits to determine their distinct mineralogical...âfootprintâ in rose quartz ⢠Display of phase changes in sapphire fluid inclusion ⢠Iridescent inclusions in scapolite...Blue sapphire rush in Madagascar ⢠Red cordierite from Madagascar ⢠Corundum from Muling, China ⢠âStar...spinel ⢠Colorless HPHT synthetic diamonds from China ⢠Polymer-treated hessonite ⢠Erratum Editorial...Washington, DC Los Angeles, California Wuhan, China Alan T. Collins Robert E. Kane Guanghai Shi |  | | 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 |  | | 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 |
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