 | 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) | | Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin...oxygen isotopic composition of gem corundum was measured from 22 deposits and occurrenEditorial handling:...dâAntananarivo, Ambohitsaina, BP 906, Antananarivo 101, Madagascar Y. Offant Cerege, Europole MĂŠditerranĂŠen de lâArbois...Ambaranjana Antanimora, Antananarivo 101, Madagascar ces in Madagascar to provide a gemstone geological identification...identification and characterization. Primary corundum deposits in Madagascar are hosted in magmatic (syenite and |  | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | 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) | | minerals Review Ruby Deposits: A Review and Geological Classification Gaston Giuliani 1, *, Lee A. Groat... Abstract: Corundum is not uncommon on Earth but the gem varieties of ruby and sapphire are 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...Earthâs surface. Classification systems for corundum deposits are based on different mineralogical and geological |  | | Book | | Isabella Pignatelli and Vincent Pardieu Ruby Deposits: A Review and Geological ClassiďŹcation Reprinted...Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus SrâPb...Coexisting Rubies and Blue Sapphires from Major World Deposits: A Brief Review of Their Mineralogical Properties...experience working on genetic aspects of mineral deposits in Canada, Australia, New Zealand, China and many...leads industry-CODES-funded projects on the Ore Deposits of SE Asia. He is currently associate editors |  | Garnier, V., Ohnenstetter, D., Giuliani, G., Fallick, A. E., Phan Trong, T., HoĂ ng Quang, V., Pham Van, L., Schwarz, D. (2005) Basalt petrology, zircon ages and sapphire genesis from Dak Nong, southern Vietnam. Mineralogical Magazine, 69 (1) 21-38 doi:10.1180/0026461056910233 | Journal (article/letter/editorial) | | pp. 21Âą38 Basalt petrology, zircon ages and sapphire genesis from Dak Nong, southern Vietnam 1 1 ...Switzerland 2 ABS TR ACT Basalts associated with sapphire deposits are widespread in Europe, Africa, Asia and...crustal fluids. Ăż d K EY WORDS : Ăż % % Ăż Ăż sapphire, basalt, petrography, geochemistry, zircon, U-Pb...from secondary erosional deposits in southeast Asia, Australia and Madagascar. The basalt ÂŽelds yielding...recovered from secondary alluvial and eluvial deposits. Recent * E-mail: virginie_garnier@inrs-ete.uquebec |  | | Journal (issue) | | Liddicoatite Tourmaline from Anjanabonoina, Madagascar Dona M. Dirlam, Brendan M. Laurs, Federico Pezzotta...in heat-treated sapphire 86 Gem News International ⢠Special report: New corundum treatment from Thailand...elbaite with Cu ⢠Vesuvianite from Kenya and Madagascar ⢠Star opal triplets ⢠Plus: Emeralds from Hiddenite...Hiddenite, North Carolina ⢠Star emerald from Madagascar ⢠Tourmaline âsliderâ in quartz 107 109 111...them (âA special tributeâŚ,â 1997). During World War II, from August 1942 until 1940 1941 June 28, 1940 |  | | 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...first confirmed bedrock source of alluvial sapphire deposits in southwest Montana has been found 9 km west...source rock of the Silver Bow occurrence is a sapphire-bearing felsic lapilli tuff of the Eocene Lowland...composition is atypical of known primary sapphire deposits and may represent a previously unrecognized |  | | Journal (article/letter/editorial) | | formation of the thorianite and sapphire deposits from SE Madagascar B. Moine A. Ramambazafy Lab Min6ralogie...Universit~ d'Antananarivo, BP 906, Antananarivo, Madagascar M. Cuney CREGU, BP23, 54501 Vandoeuvre, France...elements. The examples of two metasomatic deposits from S.E. Madagascar document this situation. Thorianite-bearing...granulites from South Madagascar, fluid circulations have produced a lot of phlogopite deposits which are hosted...TR. Primary fluid inclusions in skams (within corundum, spinel, anorthite, hibonite, wollastonite) as |  | | Journal (article/letter/editorial) | | of needle-like rutile inclusions in natural gem corundum: A combined EPMA, LA-ICP-MS, and nanoSIMS investigation...chemistry and microscopic observations of included gem corundum (Îą-Al2O3) suggests a new model of syngenetic growth...elements in gem-quality corundum (ruby and sapphire). Nonetheless, the corundum structure is relatively...Nb, Sn, La, Ce, Ta, and W are found in natural corundum. Their concentrations are typically correlated...contents of Ti and silky or cloudy zones in the corundum that contain a high concentration of needle-like |  | 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) | | reserved. Keywords: Trace elements; ICP-MSâLA; Corundum; Magmatic sapphires; Metamorphic sapphires 1...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...elements such as V, Ga and Mg are also present in corundum, but in lesser amounts. Knowing the precise concentration...geochemical approach. The use of trace elements in corundum was already demonstrated, i.e. Calligaro et al |  | | Journal (issue) | | 3, July 2004 ISSN: 1355^1565 129 Gem corundum deposits in Vietnam Pham Van Long1, Hoang Quang Vinh2...importance of marble and basalt-type deposits. Other types of corundum occurrences are found in amphibolite...isotopic characteristics of these different types of corundum are described. The most notable features of rubies...ruby and sapphire-producing country in south-east Asia {Figure 1). Discovery of gem corundum in Vietnam...this paper, the term ruby is used for Cr-bearing corundum including pink and purple coloured crystals. Development |  | | Journal (issue) | | FEATURE ARTICLES 464 Geology of Corundum and Emerald Gem Deposits: A Review Gaston Giuliani and Lee...two decades, knowledge of the formation of gem deposits has improved significantly. This article reviews...knowledge of the geology and genesis of gem corundum and emerald deposits. p. 569 512 A Review of Analytical... 536 Geographic Origin Determination of Blue Sapphire Aaron C. Palke, Sudarat Saeseaw, Nathan D. Renfro...Shane F. McClure In some cases, the value of a sapphire depends strongly on its geographic origin. This |  | | Journal (issue) | | Hans-Rudolf Wenk, and George R. Rossman The Indaia Sapphire Deposits of Minas Gerais, Brazil David S. Epstein,...selected for third place "Update on Diffusion-Treated Corundum: Red and Other Colors," by Sllane McClure, Robert...courtesy of Minerales y Metales del 0 ' ""' '" Va ichael II, ntr, HISTORY OF THE MINE The mining of ametrine...regional fault system, along which other quartz deposits have been identified. In the immediate area of...resistant to weathering and erosion. Several quartz deposits occur along this regional fault system (Litherland |  | Krebs, Mandy, Hardman, Matthew, Pearson, David, Luo, Yan, Fagan, Andrew, Sarkar, Chiranjeeb (2020) An Evaluation of the Potential for Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus SrâPb Isotope Compositions. Minerals, 10 (5) 447 doi:10.3390/min10050447 | Journal (article/letter/editorial) | | Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus SrâPb... Abstract: The geographic origin of gem corundum has emerged as one of its major value factors...determination of corundum provenance. However, owing to similar properties and features of gem corundum from different...very low levels of many trace elements in gem corundum, the determination of geographic origin remains...several different localities of geologically similar deposits: high-Fe amphibolite-type rubies, low-Fe marble-type |  | | Journal (issue) | | publishers. Cover Picture Faceted sapphire from Cyangugu district, SW Rwanda. See Investigations on sapphires...Sapphires have been discovered in the Cyangugu district in south-west Rwanda (bordering Zaire) and details...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?... 2 88 bIUM.IU .QL. AZ... ..Q1L ..2.9.. ~ !II!1!lf ..u.... f~ S u::... .li... e 2.lc... |  | | Journal (article/letter/editorial) | | [4] and for exploration quests to find new ruby deposits [5,6]. This Special Issue brings together seven...mineral associates from a wide range of global deposits across various genetic settings. The papers cover...ruby and its range of genetic expressions in its deposits by Giuliani et al. [7]. This not only provides...presents an encompassing survey of its global deposits through historic and geological time. From this...new research territory [8â13]. Research into gem corundum, however, is a continuing process, and new aspects |  | | Journal (issue) | | INSTITUTE OF AMERICA Characterization of Montana Sapphire Morphology of Colombian Emerald 2023 Tucson Report...VOLUME 59, No. 1 EDITORIAL 1 Sapphire from Montanaâs Secondary Deposits, Colombian Emerald Morphology...Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock Creek, Missouri River, and...geological characteristics of the three secondary sapphire deposits in the state of Montana, as well as the properties...diamond ⢠Arrow-patterned negative crystals in sapphire ⢠Solid inclusions in flame-fusion ruby ⢠Quarterly |  | | Journal (issue) | | Volume 36 / No. 8 / 2019 Sapphire Intaglio from Pompeii Chinese Synthetic Diamonds Trapiche Rubies...Assemblage in Emerald | Six-Rayed Star Enstatite from Madagascar | Yellowish Green Enstatite (and Star Enstatite)...Powellite and Molybdenite Inclusions | Quartz from Madagascar with Fuchsite Phantom Inclusions | Tourmaline...Ming Cultured Pearls | Dyed Banded Agate from Madagascar Cover photo: An 11.62 ct intaglio excavated...from Pompeii, Italy, proved to be a basaltic-type sapphire (see article on pp. 710â725 of this issue) and |  | | 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...Kenya, Zimbabwe, Nigeria, and Namibia, as well as Madagascar), South America (Brazil and Colombia), central...provides a comprehensive overview of those gem deposits that were either new or remained commercially...Myanmar (Burma); blue and pink sapphires from Madagascar; a wide variety of colored stones from southern |  | Sutherland, F. L., Zaw, K., Meffre, S., Giuliani, G., Fallick, A. E., Graham, I. T., Webb, G. B. (2009) Gem-corundum megacrysts from east Australian basalt fields: trace elements, oxygen isotopes and originsâ. Australian Journal of Earth Sciences, 56 (7) 1003-1022 doi:10.1080/08120090903112109 | Journal (article/letter/editorial) | | information: http://www.tandfonline.com/loi/taje20 Gem-corundum megacrysts from east Australian basalt fields:...Australia c CODES ARC Centre of Excellence in Ore Deposits, University of Tasmania , Private Bag 126, Hobart...Fallick , I. T. Graham & G. B. Webb (2009) Gem-corundum megacrysts from east Australian basalt fields:...of Earth Sciences (2009) 56, (1003â1022) Gem-corundum megacrysts from east Australian basalt ďŹelds:...Australia. 3 CODES ARC Centre of Excellence in Ore Deposits, University of Tasmania, Private Bag 126, Hobart |  | | Journal (article/letter/editorial) | | Color Zonation and Chemical Composition of Penglai Sapphire in Hainan Province, China Guang-Ya Wang 1,2 ,...(LAâICPâ MS). The results show that the Penglai sapphire has a magmatic origin, mostly showing various...in rims is higher than in cores of color-banded sapphire, which results from ubiquitous Ti-bearing inclusions...sapphires. Sapphire in Hainan Province, China. Minerals 2022, 12, 832. https:// Keywords: sapphire; color...Gem-grade corundum is also known as sapphire and ruby. As a variant of natural Îą-Al2 O3 , corundum with a |  | | Report (issue) | | Report SAPPHIRE ON FIELDS OF BY B. Dunstan, F.G.S. ANAKIE 1902 . QUEENSLAND. THE SAPPHIRE...Government I Office, 22nd Brisbane, Fields of Sapphire January, 1902. two Anakie, with Geologist... Topographical 4. Methods of 7. treating sapphire notes Mineralogical outlines. Geological 3... wash. sapphire (f) Phyolite. 11. (g) Billy. Hints to (h) Basalt. (i) Sapphire deposits. 5. The... sapphire fields (a) Retreat (b) Policeman (c) Central (d) Tomahawk (e) Smaller sapphire miners |  | | Journal (issue) | | Cleef & Arpels at Singapore Museum Montana Sapphire Deposits Under The Spotlight Exceptional Gemstones...Cleef & Arpels at Singapore Museum Montana Sapphire Deposits Under The Spotlight Cover images:Tourmaline:...images:Tourmaline: courtesy of Ian Kalway. Sapphire and ruby: courtesy of Jeffrey Scovil, ŠPrimagem. CONTENTS Foreword...Display in Arizona Investigating The Montana Sapphire Deposits Perettiite Classified By IMA As New Mineral...the three big colored stones, emerald, ruby and sapphire, the name of a specific country, such as Colombia |  | | Journal (article/letter/editorial) | | associated volcaniclastic rocks as a source of sapphire in eastern Australia a a G. M. Oakes , L. M...associated volcaniclastic rocks as a source of sapphire in eastern Australia, Australian Journal of Earth...associated volcaniclastic rocks as a source of sapphire in eastern Australia G. M. OAKES, L. M. BARRON...South Wales, St Leonards, NSW 2065, Australia. Corundum occurs widely in eastern Australia, especially...world's largest producing sapphire mine at Kings Plains. The alluvial deposits of New England show strong |  | | Journal (issue) | | calcite bangles resembling jadeite|Large pink sapphire with diffusioninduced star|Mid-year 2016 Myanma... ARTICLES Feature Articles 294 Ruby and Pink Sapphire from Aappaluttoq, Greenland By Christopher P....Gemmological Association of Great Britain ISSN: 1355-4565 ii Cert no. TT-COC-002454 Understanding Gems ⢠The...help distinguish natural from synthetic ruby and sapphire. Both mounted and loose gems can be tested. Measuring...coloration of âpigeon-bloodâ ruby and âroyal blueâ sapphire. Special Reports released prior to the Congress |
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