 | | Journal (article/letter/editorial) | | granitic pegmatites in Zambia, Madagascar, Russia, Mozambique, the United States, Nepal, and the Democratic...(> 3 wt.% MnO) elbaite and “fluor-elbaite”. Though rare, yellow rossmanite and “fluor-rossmanite” from...from Mozambique also occur. Overall, the MnO content ranges from 3.09 to 8.90 wt.%. The FeO contents are...form. Its presence implies that the original pegmatite-forming melt must be relatively low in Fe and...stages of pegmatite formation to crystallize yellow elbaite, “fluor-elbaite”, rossmanite or “fluor-rossmanite” |  | | Journal (article/letter/editorial) | | magmatic, pegmatitic environments are most commonly elbaite and fl uorliddicoatite species, and the rarer gem...tourmaline, gemstone, Paraíba-type, chromophores, gem deposits TOURMALINE AS A GEMSTONE Perhaps more than any...the late 18th century the discovery of rubellite deposits near Nerchinsk, Siberia, and the fi nds of Brazilian... 333 O C TOBER 2011 Specimen of polychrome elbaite crystals (28 cm tall), characteristic of gem tourmaline...FIGURE 2 FIGURE 3 Pendant consisting of two Mozambique copperbearing tourmalines (10.95 ct pink and |  | Bosi, Ferdinando, Skogby, Henrik, Ciriotti, Marco E., Gadas, Petr, Novák, Milan, Cempírek, Jan, Všianský, Dalibor, Filip, Jan (2017) Lucchesiite, CaFe2+3Al6(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup. Mineralogical Magazine, 81 (1) 1-14 doi:10.1180/minmag.2016.080.067 | Journal (article/letter/editorial) | | Republic, (49°27′49.38″N, 16°9′54.34″E) in anatectic pegmatite contaminated by host calc-silicate rock. Crystals...oxy-species, two are hydroxy-species and four are fluor-species (Table 1). A formal description of the new...Tsilaisite Adachiite Fluor-species Fluor-dravite Fluor-schorl Fluor-elbaite Fluor-tsilaisite a Formula...NEW MINERAL SPECIES OF TOURMALINE labelled it ‘fluor-feruvite from Sri Lanka, Ratnapura Gem Gravels’...mines around the area which are mostly in alluvial deposits in gem-bearing river gravels (‘illam’) in |  | | Journal (issue) | | ARTICLES 464 Geology of Corundum and Emerald Gem Deposits: A Review Gaston Giuliani and Lee A. Groat Over...two decades, knowledge of the formation of gem deposits has improved significantly. This article reviews...geology and genesis of gem corundum and emerald deposits. p. 569 512 A Review of Analytical Methods...especially with the development of ruby mining in Mozambique. This contribution outlines GIA’s methods and...chemical diversity of emeralds from different deposits worldwide allows clear origin determination in |  | | Book (edition) | | China Fluomatromicrolite, x 25111111, Naipa mine, Mozambique Daliranite, 5111111, Zarshouran Au-As deposit...will be difficult to distinguish fluor-elbaite from elbaite, fluor-schorl from schorl etc. Minerals published...CCM CM DANR EJM JMPS MM MP NJMA ZRMO Republic province prefecture county departement departamento ...late-stage hydrothermal mineral in a syenite pegmatite at Tvedalen, Langesundsfjord, Vestfold, Norway...Intergrown in thaleniteM crystals from the NYF-pegmatite at Askagen quarry, Viirmland, Sweden, in tiny |  | | Journal (issue) | | Dating of Zircon Inclusions in Sapphire Ethiopia Field Report 2019 Tucson Report Spring 2019 VOLUME 55...metamorphic origin for sapphire samples from these deposits, supported by their traceelement composition and...affected by cut and the orientation of table facets. FIELD REPORTS 72 p. 135 Land of Origins: A Gemological...the submission of articles on all aspects of the field. Please see the Author Guidelines at gia.edu/gemsgemology...published in G&G are also welcome. Please note that Field Reports, Lab Notes, Gem News International, Micro-World |  | | Conference Proceedings | | are also working on these related projects: Ore deposits View project Pegmatology View project All content...gemmologists who have published in the gemmological field. Applications for Observer status, which shall be...phires from Chantaburi – Trat and Kanchanburi gems field, Thaïland. 12:20 – 12:40 Stephen Kennedy Review...heat treatment of rubies and pink sapphires from Mozambique and Greenland. 15:00 – 15:20 Sutas Singbamroong...Xianyu: Turquoise from Zhushan county in Hubei province of China Elizabeth Su: The vivid world of jadeite |  | | Journal (issue) | | in a Purple Spinel from Tanzania | Separating Elbaite from Liddicoatite Paraíbatype Tourmaline | Gemquality...been mined from serpentinite-hosted deposits in Kerman Province in south-east Iran for the past two decades...by Brad Payne. ARTICLES Demantoid from Kerman Province, South-east Iran: A Mineralogical and Gemmological...the easily exploited near-surface areas of the deposits were exhausted at the end of the 1980s, most of...needed in order to mine deeper portions of the deposits. Miguel Carlos Zenetos (mzenetos@hotmail.com) |  | | Journal (issue) | | News International Amber with mineral inclusions • Field research on Tibetan andesine • Aquamarine and heliodor...the submission of articles on all aspects of the field. Please see the Guidelines for Authors at gia.edu/gandg...then, groundbreaking articles on emerging gem deposits in Madagascar and countries on the African continent...Pakistan, Sri Lanka, Tajikistan, Kenya, Madagascar, Mozambique, Tanzania, and Brazil. The scapolite group consists...in the marialite field, and yellow and colorless samples fell in the meionite field. Because of the uncertainties |  | | Journal (issue) | | Sapphire from the Tan Huong–Truc Lau Area, Yen Bai Province, Northern Vietnam Nguyen Ngoc Khoi, Chakkaphan...the submission of articles on all aspects of the field. Please see the Guidelines for Authors at gia.edu/gandg...characteristics of r uby and sapphire from Yen Ba i Province, in nor thern V ietnam. There is an ar ticle by...developments and the most comprehensive coverage in the field.” This still rings true today! Cheers, Jan Iverson...SAPPHIRE FROM THE TAN HUONG–TRUC LAU AREA, YEN BAI PROVINCE, NORTHERN VIETNAM Nguyen Ngoc Khoi, Chakkaphan |  | | Book | | 40Ar/39Ar Age of the Gem-Bearing Boqueirão Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted...Gabriele Lanzafame Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy:...Anthony E. Fallick and Yannick Branquet Emerald Deposits: A Review and Enhanced Classification Reprinted...Tsortanidis and Andreas Lampridis Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis Reprinted...Zappettini Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: |  | | Journal (issue) | | webprogram/Session47368.html and include topics such as diamond deposits and localities, causes of colour in diamond, inclusions...A.E., Groat, L.A. & Marshall, D. 2015. Emerald deposits around the world, their similarities and differences...Figure 22: Sunstone has been recovered from surface deposits in the Afar region of Ethiopia. Photo by T. Sintayehu...attention for a variety of new gem finds. After large deposits of play-of-colour opal were found in 2008, black...Colombia. In December of the same year, significant deposits of basaltic blue sapphires were found in the country’s |  | | Book | | 1948 to our final field season, which must have been 1952 ... Soon after the '52 field season he ceased...products of basic igneous rocks. Pre-granitic vein deposits Polymetallic (antimony-lead mainly) veins have...in Britain and it hosts many rare species (e.g. elbaite, herderite, manganotantalite, microlite and petalite)...granite has produced one of the finest kaolinite deposits in the world and, in the process of extracting...base-metal mineralization consists of joint-infill deposits in Carboniferous Limestone and Triassic Dolomitic |  | | Journal (volume) | | (see the inside of the front cover for members) Field trip Subcommittee Friedrich Koller, Co-Chairman...the front cover of the field trip guides, Acta Mineralogica-Petrographica, Field Guide Series, Vol. 1–29...AM15 Gas storage in minerals: Experimental and field studies ..........................................Economic geology (metallic and non-metallic ore deposits) (general session) ..........................................................275 EG54 Mineral deposits in terrestrial volcanic-hydrothermal systems |  | | Journal (issue) | | the submission of articles on all aspects of the field. Please see the Guidelines for Authors in the Summer...contribution to the literature in a scientific field that—in many respects— is still in its infancy....scientist, an appraiser—in this rapidly evolving field. Not just any information, but well- researched...and in some cases from natural pearls. However, field research indicates that many Chinese growers are...Shaohe of Shaohe Pearl in Chenghai, Guangdong Province (“China producing nucleated rounds,” 1995; “China |  | | Book | | out of various shaped natural pearls from the province of Zhejiang. By 200 BCE, traders had established...historical corundum gems originated from alluvial deposits in Sri Lanka (Ceylon); which is still considered...corundum deposits were found with the most important ones been in Madagascar and Mozambique (Africa)...even before that period. Currently, in the Hubei Province, China, turquoise has been exploited. During excavations...ancient mining have been found yet. Turquoise deposits of New Mexico (Los Cerillos), and probably California |
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