 | | Journal (article/letter/editorial) | | testable. Introduction Most of the world’s 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...deposits of the gem-quality variety sapphire in eastern Australia, eastern China, the Indochina region of southeastern |  | | Journal (article/letter/editorial) | | eastern Australia, far eastern Russia, eastern China, Laos, Vietnam, Thailand, Rwanda, Cameroon, Nigeria...pallasite meteorites, gem benitoite from San Benito County California, and Colombian emeralds (for whose genesis...confusion among geologists and mineralogists. ‘Sapphire’ and ‘ruby’, for example, are not mineral names...cushioned. Minerals near CCG deposits, feldspar, talc, calcite and mica (Figure 2), for example, whether in outcrop... Tanzania and Madagascar. The gravels in each deposit include gem-forming minerals that crystallized |  | | 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...continuously secreted to wrap the inorganic crystals of calcite and aragonite as a sponge embraces its voids. There...calcium carbonate (CaC0 3 ), usually in the form of calcite. The prisms of this layer are perpendicular to |  | | 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 (article/letter/editorial) | | inclusions 59701 MA ABSTRACT Gem corundum (sapphire) has been mined from an ultramafic lamprophyre...recrystallized melt inclusions contain analcime and calcite drawing a striking resemblance to leucocratic ocelli...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 |  | | 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 |  | 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...Gems Inc.Photo: (Vancouver, BC, True Canada). deposit, southwest Greenland. Courtesy North Gems Inc....Polonnaruwa; Elahera. Nepal: (47) Chumar, Ruyil. China: (48) Qinghai; (49) Elahera. Nepal: Chumar, Ruyil |  | | Journal (issue) | | Volume 36 / No. 8 / 2019 Sapphire Intaglio from Pompeii Chinese Synthetic Diamonds Trapiche Rubies...Zimbabwe | Apatite from Durango, Mexico | Cobaltoan Calcite from Switzerland | Pyrite and Chromite Inclusion...from Pompeii, Italy, proved to be a basaltic-type sapphire (see article on pp. 710–725 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 |  | Palke, Aaron C., Wong, Jacqueline, Verdel, Charles, Ávila, Janaína 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 | |  | Giuliani, Gaston, Fallick, Anthony, Rakotondrazafy, Michel, Ohnenstetter, Daniel, Andriamamonjy, Alfred, Ralantoarison, Théogène, 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 −0.3 and 16.5‰. 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) 42:251–270 gem quality...ratios (18O/16O) in the lattice oxygen of ruby and sapphire to provide a gemstone geological identification |  | | 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) | | 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 (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- |  | | Journal (issue) | | Pakistan|Quartzite and calcite bangles resembling jadeite|Large pink sapphire with diffusioninduced star|Mid-year...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 |  | | Journal (issue) | | a collection of chrysoberyl samples from these sapphire placer deposits to determine their distinct mineralogical...“footprint” 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 • “Star...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 (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, ~1.5– 2.5 cm in diameter) are from a new deposit in the Kondoa District of Tanzania. Photo by Brendan...translucent areas. Carbonate mineral inclusions such as calcite and dolomite were documented in trapiche ruby arms |  | | 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...1992. The nzby crystrrls from the Mong Hsu marble deposit have clipymmidnl to barrel-shaped hobils and reverrl |  | | 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 “horse conch” pearls • “Golden sheen” star sapphire • Cabochons from Crassostrea virginica shell • |  | | Journal (issue) | | , 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 |  | | Book | | Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus Sr–Pb...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 CODES—Centre of Ore Deposit and Earth Sciences, University of Tasmania, Hobart |  | | Journal (issue) | | (7) 2.14 ct blue sapphire, (8) 23.18 ct blue spinel, (9) 4.82 ct purple sapphire, (10) 5.32 ct Paraíba...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) | | and Y a n Liu NOTES AND NEW TECHNIQUES Ruby and Sapphire from the Southern Ural Mountains, Russia Alexander...Alexander J. Kissin Primary occurrences of ruby, pink sapphire, sapphires of other colors, and spinel have been...specimens were relatively large (pink and blue sapphire up to 10 x 20 mm; ruby up to 10 mm) but not of...marble quarry, where he discovered ruby, pink sapphire, and other varieties of corundum in situ (figure...(figure 1).In 1983, ruby and several varieties of sapphire were found in marble at Choolzsinsolzoye near |  | | Journal (issue) | | Hauzenberger 551 Conferences Sinkankas Symposium—Sapphire|Presentations in Tucson, Arizona, USA 554 Gem-A...Gemewizard Ltd., Ramat Gan, Israel; Guanghai Shi, China University of Geosciences, Beijing; James E. Shigley...Madagascar, as well as the gemmological features of 38 sapphire samples (mostly blue but also some pinkish orange)...Posted online by GIA in February 2017, ‘A study of sapphire from Chanthaburi, Thailand and its gemological...Nigeria. Visit www.gia.edu/ gia-news-research/sapphire-chanthaburi-thailandgemological-characteristics |  | | 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 |
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