 | | Journal (issue) | | JOURNAL OF THE GEMOLOGICAL INSTITUTE OF AMERICA Gem Art of the Taj Mahal and the Mughal Era Characteristics...in Corundum from Bo Welu, Thailand Fall 2019 VOLUME 55, No. 3 EDITORIAL 293 Gem Art of the Taj Mahal...Chris L. Rogers, and Robert Weldon A look at the gem ornamentation of this landmark, as well as the jewels...in Ruby and Sapphire from the Bo Welu Gem Deposit in Chanthaburi, Thailand Supparat Promwongnan and Chakkaphan...and Color of Cultured Half-Pearls from Phuket, Thailand Kannika Kanjanachatree, Napapit Limsathapornkul |  | | Journal (issue) | | NikolaiР. Yushkin GEMSTONES OF ТНЕ ТIМAN-NORTH URAL PROVINCE .............................. 3 EduardF. Emlin...23 A.F. Bushmakin СRОСОПЕ FROM ТНЕ BEREZOV GOLD MINES ............................................ 28...... 56 Pierre-Nicolas Schwab Sainte-Marie-лux- Mines ..................................................ВЫСОКОКАЧЕСТВЕННЫХ UЕННЫХ Gemmological Associat1on and t " Gem Testing - ·, Laboratory of Great Britain ОБРАЗUОВ...СТАРЫХ мnнЕРАnогnчЕскnх кнnг n nНСТРУМЕНТОВ .✓- Gem test.ing,peari testingand diamond gradingservices |  | | Journal (issue) | | minerals at the Line Pit, State Line chromite district, Pennsylvania and Maryland ..................149...Desautels, who has been “ Curator-inCharge” of the Gem and Mineral Collections for many years, has asked...duties o f “ Associate Curator-in-Charge” of the Gem and Mineral Collections. Desautels retains his position...develop ment of a new exhibit hall of minerals and gems, including obtain ing funding for the design and...Carlon (Normal, IL) Carousel Gems and Minerals (Belen, NM) Colorado Gem and Mineral Co. (Tempe, AZ) The |  | | Journal (article/letter/editorial) | | historically important and relatively inexpensive gem material. Consequently, for completeness of our coverage...keeping with the gemstone theme of this year’s Tucson Gem and Mineral Show, spessartine has been chosen as...occurrences furnishing good specimens or important gem rough are considered below. For additional information...the eastern United States, significant specimen or gem spessartine appears to be relatively uncommon. King...specimens and gem rough found in the eastern United States are from pegmatites of the Amelia district, Amelia |  | | Journal (issue) | | 2022 Spinel from Tajikistan Cleopatra’s Emerald Mines DaylightFluorescent Hyalite from Namibia Gahnite...Standard | HRD Talks | Jewels of the Trade Podcasts Gem Notes Cover photo: Spinel from Kuh-i-Lal, in the...Lomthong and Theodore Rozet 156 Cleopatra’s Emerald Mines: The Marketing of a Myth By Jack M. Ogden 114 ...Tom Stephan, Ulrich Henn and Stefan Müller 156 Gem-A Notices Photo by Sandeep Kumar Vijay 183 On the...Literature of Interest 206 The Journal is published by Gem-A in collaboration with SSEF and with the support |  | | Book (edition) | | EDITION AREM, PH.D., FG.A. gem gemologists, 1977, jewelers, and gem collectors, dealers have relied...acclaimed sourcebook for immediate this information on gems. updated and revised, Color Encyclopedia of Gemstones...particular a ability, rarity, book's the graphs gems gemstone's physical chemistry, occurrence, properties...coverage this second edition is of synthetic gems. In this section you will find complete data on...unusual synthetics some hardly ever encountered as cut gems and parts. — therefore posing serious identification |  | | Book (edition) | | Precious and Semiprecious Stones ¢ 1,500 Photos of Gems in Rough and Polished States ¢ Complete Physical...photographs of each gem and its varieties. If you think you know all there is to know about gems, test your knowledge...usual, but pink is the most valuable color of what gem? 4. Square, half Dutch rose, and briolette — to what...Where is the world’s largest cut diamond? 6. What gem, if worn as an amulet, is said to protect against...Density and Specific Gravity 30 Weights Used in the Gem Trade _ 31 Optical Properties Color 31 Color of Streak |  | | Journal (issue) | | Societies (RMFMS) www.rmfms.org Colorado Federation of Gem & Mineral Societies (CFGMS) Articles in this Issue:...Corner Pg 8 Secretary’s Spot Pg 8 New Victor Gem & Min- Pg 9 eral Show Some Specimens to be auctioned...Founders Symposium—Ice Worlds and their Fossils. Mines, Golden, Colorado. See www.westernpaleo.org for...Fri-Sat-Sun, Mar. 22-24, Fort Collins Rockhounds Gem and Mineral Show, McKee 4-H Building at The Ranch...purchase “gem black diamonds” at a price one could not ignore. At about the same time one of the gem channels |  | | Book (edition) | | arranges gems according to mineral species. There is also a complete cross index of familiar gem names.... Information on each gem includes chemical formula, crystal structure, colors, luster, hardness, density...represent today's most sophisticated techniques for gem his own photography. three-year the exact color...clearly revealing the degree of birefringence in a gem, as well as any inclusions Some of the data provided...published before, such as the dispersion values for 15 gem materials. These values are calculated from |  | | Book (edition) | | ~ FOURTH: > EDIPION - 860 . #1,900 Photos of Gems in Rough and Polished States” Complete Physical...survey, with stunning color photographs of each gem and its varieties. Newly published in a fourth edition...versions—a total of 1,800 gems in all. If you think you know all there is to know about gems, test your knowledge...world’s largest cut diamond? Half-brilliant 5. What gem, if worn as an amulet, is said to protect against...Deposits 64 Mining Methods 68 Cutting and Polishing of Gems 69 Engraving on Stones 70 Cutting and Polishing |  | | Book | | frigidite 11 fuchsite 104 gadolinite 85 gahnite 24 galaxite 24 hydrozincite 47 ice 23 Iceland spar 45 ...drops in cinnabar at Idrija (Yugoslavia), some mines on Mount Amiata, Tuscany (Italy), and Almadén (Spain)... Agrigento (Italy) and diopsids. Other famous mines are Dutoitspan, Bultfontein, De Beer’s, and Premier;...bituminous deposits have been found in the sulphur mines of Romagna, Italy, in association with gypsum and...found at Butte, Montana, and the Copper River district of Alaska. A much rarer mineral is covellite, |  | | | | frigidite 11 fuchsite 104 gadolinite 85 gahnite 24 galaxite 24 heliodor 93, 93 hematite 25, 25, 27 hemimorphite...drops in cinnabar at Idrija (Yugoslavia), some mines on Mount Amiata, Tuscany (Italy), and Almadén...also contains pyrope and diopsids. Other famous mines are Dutoitspan, Bultfontein, De Beer’s, and Premier;...bituminous deposits have been found in the sulphur mines of Romagna, Italy, in association with gypsum and...found at Butte, Montana, and the Copper River district of Alaska. A much rarer mineral is covellite, |  | | Journal (issue) | | Beryllium Diffusion of Rubies and Sapphires Seven Rare Gem Diamonds THE QUARTERLY JOURNAL OF THE GEMOLOGICAL..._______ 136 An Important Exhibition of Seven Rare Gem Diamonds John M. King and James E. Shigley A look...“red” spinel • Diffusion-treated tanzanite? 152 Gem News International pg. 157 • “Additional” facets...CA 92008 (760) 603-4504 blaurs@gia.edu Editors, Gem Trade Lab Notes Thomas M. Moses, Ilene Reinitz, Shane...Shane F. McClure, and Mary L. Johnson Editor, Gem News International Brendan M. Laurs Associate Editor |  | | Journal (issue) | | ····················347 1HE FRIEDENSVILLE ZINC MINES AGAIN. By C. A. Thomas ............_. ....... 348...(the new gem stc.,ne fro1n Conselheira Pena, Minas Gerais, Braz:! rough crystals and cut gems), Galena...Mr. and Mrs. Morse, proprietors of the Colorado Gem Co., had so many plans for their establishment, that...but the fiel d evidence now known is not sufdoned mines has a small content of sulfuric acid, as might be...Editor ROCKS and MINERALS One of the old copper mines which made New Jersey famous as a mm1ng state is | | | Book (edition) | | arranges gems according to mineral species. There is a lso a complete cross index of f a mili ar gem names...names. Information on eac h gem includes chemical formula , c rystal structure, colors, luster, ha rdness...represent today's most sophisticated tech niques for gem photography. Resul ti ng from his own three-year...three-year effort, they show the exact color o f faceted gem stones while displaying to best advantage the cut...clearly reveali ng the degree of b1ref ringence in a gem , as well as any 1nclus1ons Some of the data provided |  | | Journal (issue) | | soon-to-bepublished book, Brazil — Paradise o f Gems, by Jules Sauer. back issue sales: Write to the...listing 100’s on minerals, min ing, geology, fossils, gems. W rite for free illustrated brochure MRS. PERI...Bunker Hill mine in the famous Coeur D ’Alene district of Idaho has produced some of North America’s...of the Coeur d’Alene mining district, Shoshone County, Idaho. The district is roughly 24 kilometers wide...wooded country. Gold production, for which the district was first important, has been superceded by the |  | | Journal (article/letter/editorial) | | minerals, 25-30 Africa Comes to Arizona: A Tucson Gem & Mineral Show Preview, R. W. Jones, 60-61 Africa-Earth...Mexico, 302 Beyer, J., Minerals of the Granite Gap Mines, Hidalgo County, New Mexico, 298-305 Biotite, Wisconsin...pegmatite in the Italian Alps, and weekly updates on gem mining at the Cry0 Genie pegmatite, southern California...First Described from African Localities, 25-30 Galaxite, Virginia, 323 Galena, Colorado, 165; Malawi,...Africa-Earth Science Paradise, L. D. Ashwal, 12-16; Mail Gems with Caution, J. M. Matty, 152-53; Surprising Uses |  | | Journal (issue) | | invite you to be our guest at Hong Kong Jewellery & Gem Fair September 16th-20th 2019 AWE - Booth 8E03 German...Spinel Pink and Red Gem Spinels in Marble and Placers Spinel from Tajikistan – The Gem That Made Famous...Responsibility 94 Book Review Discovering the Gems of Sri Lanka 98 100 108 113 Members 14 Saurabh...Secretaries Bruce Bridges, USA Santpal Sinchawla, Thailand Board of Directors Gabriel Angarita, Colombia...Warren F. Boyd, Canada Sushil Goyal, USA Henry Ho, Thailand Rakesh Jain, Hong Kong Vijay Kedia, India Masaru |  | | Book | | GEMS MINERALS CRYSTALS and ORES GEMS MINERALS CRYSTALS and ORES The Collector's Encyclopedia BY..., for the field rock saw; DeBeers Consolidated Mines, Inc., for the three stages in diamond cutting;...International recogniLion has come to hitn fro1n gem and mineral organizations in thirteen countries....collected and prospected in nearly every state and province in the United States and Canada. A Fellovv of... CONTENTS Preface 9 Mineral Collecting 13 Gem Cutting 18 Identifying Minerals 32 Mineral Terms |  | | Report (issue) | | CABARRUS COUNTY 18 Minerals of the Cabarms County Mines 18 CALDWELL COUNT! 18 Pyrite 18 Sillimanite 19 CATAWBA...Actinolite. 0 , f # Minerals of the Hamme-Tungsten District . Amethyst Kyanite 0 \ \ . .."..... . Beryl...minerals are prized as semi-precious and precious gem stones, while others are cabinet specimens and valuable...of the recent interest in mineral collecting and gem cut ting which has developed in the State, this...localities are famous old mines which have been closed for years, some are present day mines, while others are |  | | Journal (article/letter/editorial) | | minerals has also an economic dimension. The value of gems and also of several industrial minerals is strongly...identical to the spectrum of synthetic end-member galaxite, MnAl2O4 (Fig. 2), recorded by Hålenius et al...in the spectra of the exclusively Mn2+-bearing galaxite. Detailed inspection of the present spectrum discerns...of the end-member galaxite (Fig. 2). The absorption bands recorded in the galaxite spectrum (Hålenius...Mn 2+ in spectra of the spinel (sensu stricto)-galaxite series (Hålenius et al. 2007, 2011). The two broad | | | Book | | for the field rock saw; DeBeers Consoli¬ dated Mines, Inc., for the three stages in diamond cutting;...International recognition has come to him from twelve gem and mineral organizations on four continents. Professor...collected and prospected in nearly every state and province in the United States and Canada. A Fel¬ low of... CONTENTS Preface 9 Mineral Collecting 13 Gem Cutting 18 Identifying Minerals 32 Mineral Terms...Crystals 74 Origin of Mineral Names 87 Minerals and Gems 95 Rocks 241 Meteorites 263 Geology and Mining |  | | Journal (issue) | | Specialties: W. Canadian and w orldw ide minerals & gems Harvard Mineralogical Museum Curators: Dr. Carl...minerals & fossils G eology Museum Colo. School o f Mines Curator: Virginia A. Mast Tel: (303) 273-3823 G...orldwide minerals, gold, gem crystals, colored gemstones Support organization: The Gem and Mineral Council...on. & holidays Specialty: W orldwide minerals & gems Musee de geologie de PUniversite Laval Curator:...ide minerals & fossils N e w M exico Bureau o f Mines & Mineral Resources Mineral Museum M ineralogist/Curator: |  | | Journal (issue) | | non-technical contributions will bo considered for Australian Gems & Crahs Magazine. Responslb1hty cannot...M1neralog1st Is published in con1unc11on with Austrahon Gems & Crafts Magazine, Printed by Quadncolor Industries...metasediments and metavolcanics of the Broken Hill district are probably orig ina lly about 1 800 m .y. old...g a h ) , her,, sp, to gah-, her,. sp, and the galaxite component is generally less than 1 % (Figure 1...used on the front cover of the enclosing Australian Gems & Crafts Magazine. Preference wrll be given to articles | | | Book | | , for the field rock saw; DeBeers Consolidated Mines, Inc., for the three stages in diamond cutting;...International recognition has trade, come to him from gem and mineral organizations in thirteen countries...collected and prospected in nearly every state and province in the United States and Canada. A Fellow of the... CONTENTS Preface 9 Mineral Collecting 13 Gem 18 Cutting Identifying Minerals 32 Mineral Terms...Crystals Origin of Mineral Minerals and Names Gems Rocks 87 95 241 Meteorites 263 Geology and |
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