Hyalite Opal from Zacatecas, 470 Practical Gemmology Mexico a Matched Pair of Opals, with by Emmanuel Fritsch, Peter K
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Summer 2006 Gems & Gemology Gem News
EDITOR Brendan M. Laurs ([email protected]) CONTRIBUTING EDITORS Emmanuel Fritsch, IMN, University of Nantes, France ([email protected]) Henry A. Hänni, SSEF, Basel, Switzerland ([email protected]) Franck Notari, GIA GemTechLab, Geneva, Switzerland ([email protected]) Kenneth V. G. Scarratt, GIA Research, Bangkok, Thailand ([email protected]) COLORED STONES AND tusk fragments. The amber in figure 1 was eventually ORGANIC MATERIALS acquired by Barry Schenck of M. M. Schenck Jeweler Inc., Chattanooga, Tennessee, who recently loaned it to GIA for Alaskan amber. Few may think of Alaska as a source of examination. Mr. Schenck has counted more than 30 amber, but the Inuit people have long collected this organ- insects trapped inside the piece, as well as other organic ic gem from northern beach gravels between Harrison Bay materials, including an apparent seedpod. GIA subsequent- and Smith Bay on the Arctic Ocean. In Gemstones of ly purchased the piece (Collection no. 35840). North America (D. Van Nostrand Co., Princeton, NJ, Most of the insects were eye-visible, though others 1959), J. Sinkankas noted that locals refer to the amber as were best seen with magnification (up to 40×). Prominent auma, which translates as “live coal.” were a mosquito, spiders, beetles, gnats, ants, and possibly In 1943, an American soldier stationed in Alaska found a bee (see, e.g., figure 2). Other inclusions consisted of gas a 117.8 g chunk of amber (figure 1) while strolling along bubbles and debris that was probably associated with the the coast. Subsequent visits to the area yielded other trees from which the amber formed. -
Rhodochrosite Gems Unstable Colouration of Padparadscha-Like
Volume 36 / No. 4 / 2018 Effect of Blue Fluorescence on the Colour Appearance of Diamonds Rhodochrosite Gems The Hope Diamond Unstable Colouration of in London Padparadscha-like Sapphires Volume 36 / No. 4 / 2018 Cover photo: Rhodochrosite is prized as both mineral specimens and faceted stones, which are represented here by ‘The Snail’ (5.5 × 8.6 cm, COLUMNS from N’Chwaning, South Africa) and a 40.14 ct square-cut gemstone from the Sweet Home mine, Colorado, USA. For more on rhodochrosite, see What’s New 275 the article on pp. 332–345 of this issue. Specimens courtesy of Bill Larson J-Smart | SciAps Handheld (Pala International/The Collector, Fallbrook, California, USA); photo by LIBS Unit | SYNTHdetect XL | Ben DeCamp. Bursztynisko, The Amber Magazine | CIBJO 2018 Special Reports | De Beers Diamond ARTICLES Insight Report 2018 | Diamonds — Source to Use 2018 The Effect of Blue Fluorescence on the Colour 298 Proceedings | Gem Testing Appearance of Round-Brilliant-Cut Diamonds Laboratory (Jaipur, India) By Marleen Bouman, Ans Anthonis, John Chapman, Newsletter | IMA List of Gem Stefan Smans and Katrien De Corte Materials Updated | Journal of Jewellery Research | ‘The Curse Out of the Blue: The Hope Diamond in London 316 of the Hope Diamond’ Podcast | By Jack M. Ogden New Diamond Museum in Antwerp Rhodochrosite Gems: Properties and Provenance 332 278 By J. C. (Hanco) Zwaan, Regina Mertz-Kraus, Nathan D. Renfro, Shane F. McClure and Brendan M. Laurs Unstable Colouration of Padparadscha-like Sapphires 346 By Michael S. Krzemnicki, Alexander Klumb and Judith Braun 323 333 © DIVA, Antwerp Home of Diamonds Gem Notes 280 W. -
Lapidary Journal Jewelry Artist March 2012
INDEX TO VOLUME 65 Lapidary Journal Jewelry Artist April 2011-March 2012 INDEX BY FEATURE/ Signature Techniques Part 1 Resin Earrings and Pendant, PROJECT/DEPARTMENT of 2, 20, 09/10-11 30, 08-11 Signature Techniques Part 2 Sagenite Intarsia Pendant, 50, With title, page number, of 2, 18, 11-11 04-11 month, and year published Special Event Sales, 22, 08-11 Silver Clay and Wire Ring, 58, When to Saw Your Rough, 74, 03-12 FEATURE ARTICLES Smokin’*, 43, 09/10-11 01/02-12 Argentium® Tips, 50, 03-12 Spinwheel, 20, 08-11 Arizona Opal, 22, 01/02-12 PROJECTS/DEMOS/FACET Stacking Ring Trio, 74, Basic Files, 36, 11-11 05/06-11 DESIGNS Brachiopod Agate, 26, 04-11 Sterling Safety Pin, 22, 12-11 Alabaster Bowls, 54, 07-11 Create Your Best Workspace, Swirl Step Cut Revisited, 72, Amethyst Crystal Cross, 34, 28, 11-11 01/02-12 Cut Together, 66, 01/02-12 12-11 Tabbed Fossil Coral Pendant, Deciphering Chinese Writing Copper and Silver Clay 50, 01/02-12 Linked Bracelet, 48, 07-11 12, 07-11 Stone, 78, 01/02-12 Torch Fired Enamel Medallion Site of Your Own, A, 12, 03-12 Easier Torchwork, 43, 11-11 Copper Wire Cuff with Silver Necklace, 33, 09/10-11 Elizabeth Taylor’s Legendary Wire “Inlay,” 28, 07-11 Trillion Diamonds Barion, 44, SMOKIN’ STONES Jewels, 58, 12-11 Coquina Pendant, 44, 05/06-11 Alabaster, 52, 07-11 Ethiopian Opal, 28, 01/02-12 01/02-12 Turquoise and Pierced Silver Ametrine, 44, 09/10-11 Find the Right Findings, 46, Corrugated Copper Pendant, Bead Bracelet – Plus!, 44, Coquina, 42, 01/02-12 09/10-11 24, 05/06-11 04-11 Fossilized Ivory, 24, 04-11 -
Tourmaline Composition of the Kışladağ Porphyry Au Deposit, Western Turkey: Implication of Epithermal Overprint
minerals Article Tourmaline Composition of the Kı¸slada˘gPorphyry Au Deposit, Western Turkey: Implication of Epithermal Overprint Ömer Bozkaya 1,* , Ivan A. Baksheev 2, Nurullah Hanilçi 3, Gülcan Bozkaya 1, Vsevolod Y. Prokofiev 4 , Yücel Özta¸s 5 and David A. Banks 6 1 Department of Geological Engineering, Pamukkale University, 20070 Denizli, Turkey; [email protected] 2 Department of Geology, Moscow State University, Leninskie Gory, 119991 Moscow, Russia; [email protected] 3 Department of Geological Engineering, Istanbul University-Cerrahpa¸sa,Avcılar, 34320 Istanbul, Turkey; [email protected] 4 Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, 119017 Moscow, Russia; [email protected] 5 TÜPRAG Metal Madencilik, Ovacık Mevki Gümü¸skolKöyü, Ulubey Merkez, 64902 U¸sak,Turkey; [email protected] 6 School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK; [email protected] * Correspondence: [email protected]; Tel.: +90-258-296-3442 Received: 13 August 2020; Accepted: 4 September 2020; Published: 7 September 2020 Abstract: The Kı¸slada˘gporphyry Au deposit occurs in a middle Miocene magmatic complex comprising three different intrusions and magmatic-hydrothermal brecciation related to the multiphase effects of the different intrusions. Tourmaline occurrences are common throughout the deposit, mostly as an outer alteration rim around the veins with lesser amounts disseminated in the intrusions, and are associated with every phase of mineralization. Tourmaline mineralization has developed as a tourmaline-rich matrix in brecciated zones and tourmaline-quartz and/or tourmaline-sulfide veinlets within the different intrusive rocks. Tourmaline was identified in the tourmaline-bearing breccia zone (TBZ) and intrusive rocks that had undergone potassic, phyllic, and advanced argillic alteration. -
Structural Geology of the Upper Rock Creek Area, Inyo County, California, and Its Relation to the Regional Structure of the Sierra Nevada
Structural geology of the upper Rock Creek area, Inyo County, California, and its relation to the regional structure of the Sierra Nevada Item Type text; Dissertation-Reproduction (electronic); maps Authors Trent, D. D. Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 27/09/2021 06:38:23 Link to Item http://hdl.handle.net/10150/565293 STRUCTURAL GEOLOGY OF THE UPPER ROCK CREEK AREA, INYO COUNTY, CALIFORNIA, AND ITS RELATION TO THE REGIONAL STRUCTURE OF THE SIERRA NEVADA by Dee Dexter Trent A Dissertation Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 1 9 7 3 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE I hereby recommend that this dissertation prepared under my direction by __________ Dee Dexter Trent______________________ entitled Structural Geology of the Upper Rock Creek Area . Tnvo County, California, and Its Relation to the Regional Structure of the Sierra Nevada ________________ be accepted as fulfilling the dissertation requirement of the degree of ____________Doctor of Philosophy_________ ___________ P). /in /'-/7. 3 Dissertation Director fJ Date After inspection of the final copy of the dissertation, the following members of the Final Examination Committee concur in its approval and recommend its acceptance:* f t M m /q 2 g ££2 3 This approval and acceptance is contingent on the candidate's adequate performance and defense of this dissertation at the final oral examination. -
The New IMA List of Gem Materials – a Work in Progress – Updated: July 2018
The New IMA List of Gem Materials – A Work in Progress – Updated: July 2018 In the following pages of this document a comprehensive list of gem materials is presented. The list is distributed (for terms and conditions see below) via the web site of the Commission on Gem Materials of the International Mineralogical Association. The list will be updated on a regular basis. Mineral names and formulae are from the IMA List of Minerals: http://nrmima.nrm.se//IMA_Master_List_%282016-07%29.pdf. Where there is a discrepancy the IMA List of Minerals will take precedence. Explanation of column headings: IMA status: A = approved (it applies to minerals approved after the establishment of the IMA in 1958); G = grandfathered (it applies to minerals discovered before the birth of IMA, and generally considered as valid species); Rd = redefined (it applies to existing minerals which were redefined during the IMA era); Rn = renamed (it applies to existing minerals which were renamed during the IMA era); Q = questionable (it applies to poorly characterized minerals, whose validity could be doubtful). Gem material name: minerals are normal text; non-minerals are bold; rocks are all caps; organics and glasses are italicized. Caveat (IMPORTANT): inevitably there will be mistakes in a list of this type. We will be grateful to all those who will point out errors of any kind, including typos. Please email your corrections to [email protected]. Acknowledgments: The following persons, listed in alphabetic order, gave their contribution to the building and the update of the IMA List of Minerals: Vladimir Bermanec, Emmanuel Fritsch, Lee A. -
Phenomenal Gemstones Possess Striking Optical Effects, Making Them Truly a Sight for Sore Eyes
THE PHENOMENAL PROPERTIES OF GEMS Phenomenal gemstones possess striking optical effects, making them truly a sight for sore eyes. Here is GIA’s guide to understanding what makes each phenomenon so uniquely brilliant. ASTERISM CROSSING BANDS OF REFLECTED LIGHT CREATE A SIX-RAYED STAR-LIKE APPEARANCE. ASTERISM OCCURS IN THE DOME OF A CABOCHON, AND CAN BE SEEN IN GEMS LIKE RUBIES AND SAPPHIRES. ADULARESCENCE THE SAME SCATTERING OF LIGHT THAT MAKES THE SKY BLUE CREATES A MILKY, BLUISH-WHITE GLOW, LIKE MOONLIGHT SHINING THROUGH A VEIL OF CLOUDS. MOONSTONE IS THE ONLY GEM THAT DISPLAYS IT. AVENTURESCENCE FOUND IN NATURAL GEMS LIKE SUNSTONE FELDSPAR AND AVENTURINE QUARTZ, IT DISPLAYS A GLITTERY EFFECT CAUSED BY LIGHT REFLECTING FROM SMALL, FLAT INCLUSIONS. CHATOYANCY OTHERWISE KNOWN AS THE “CAT’S EYE” EFFECT, BANDS OF LIGHT ARE CAUSED BY THE REFLECTION OF LIGHT FROM MANY PARALLEL, NEEDLE-LIKE INCLUSIONS INSIDE A CABOCHON. NOTABLE GEMS THAT DISPLAY CHATOYANCY INCLUDE CAT’S EYE TOURMALINE AND CAT’S EYE CHRYSOBERYL. IRIDESCENCE ALSO SEEN IN SOAP BUBBLES AND OIL SLICKS, IT’S A RAINBOW EFFECT THAT IS CREATED WHEN LIGHT IS BROKEN UP INTO DIFFERENT COLORS. LOOK FOR IT IN FIRE AGATE AND OPAL AMMONITE (KNOWN BY THE TRADE AS AMMOLITE). LABR ADORESCENCE A BROAD FLASH OF COLOR THAT APPEARS IN LABRADORITE FELDSPAR, IT’S CAUSED BY LIGHT INTERACTING WITH THIN LAYERS IN THE STONE, AND DISAPPEARS WHEN THE GEM IS MOVED. INSIDER’S TIP: THE MOST COMMON PHENOMENAL COLOR IN LABRADORITE IS BLUE. PLAY OF COLOR THE FLASHING RAINBOW-LIKE COLORS IN OPAL THAT FLASH AT YOU AS YOU TURN THE STONE OR MOVE AROUND IT. -
Imprints FINAL 15Dec2016.Indd
ls ia er at M ed ht ig yr op C : ss re P ity rs ve ni U se Newest Sources of Western Zhou History: ne hi Inscribed Bronze Vessels, 2000–2010 C he T Edward L. SHAUGHNESSY The University of Chicago In 2002, I published a survey of inscribed bronze vessels of the Western Zhou period that had appeared in the course of the preceding decade. timing was appropriate for at least a couple of reasons. First, the 1990s marked the first flowering of the new Chinese economic expansion; with the dramatic increase in construction activity and with newfound wealth in China came a concomitant rise in the number of ancient bronze vessels taken out of China’s earth. Although much of this excavation was unfor- tunately undertaken by tomb robbers, and the individual bronzes thus lost their archaeological context, nevertheless many of them appeared on the antiques markets and eventually made their way into museums and/or the scholarly press. Second, the decade also witnessed the five-year long Xia- Shang-Zhou Chronology Project (1995–2000). This multidisciplinary inquiry into ancient China’s political chronology was funded by the Chinese government at levels hitherto unimagined for humanistic and social science research, and it resulted in numerous discoveries and publi- cations. The chronology of the Western Zhou period, based to a very large extent on the inscriptions in bronze vessels of the period, was perhaps the most important topic explored by this project. The decade witnessed extensive archaeological excavations at several major Zhou states, as well as the discovery of several fully-dated bronze inscriptions that were the subject of much discussion in the context of the “Xia-Shang-Zhou Chro- nology Project.” 1 The sive archaeologicalThe ten years campaigns, that have severaljust passed of them have unearthing brought several sites and more ceme- exten- teries of heretofore unknown states within the Zhou realm, as well as many, many more bronze vessels from throughout the Western Zhou period, some of them with truly 2startling inscriptions. -
Inscriptional Records of the Western Zhou
INSCRIPTIONAL RECORDS OF THE WESTERN ZHOU Robert Eno Fall 2012 Note to Readers The translations in these pages cannot be considered scholarly. They were originally prepared in early 1988, under stringent time pressures, specifically for teaching use that term. Although I modified them sporadically between that time and 2012, my final year of teaching, their purpose as course materials, used in a week-long classroom exercise for undergraduate students in an early China history survey, did not warrant the type of robust academic apparatus that a scholarly edition would have required. Since no broad anthology of translations of bronze inscriptions was generally available, I have, since the late 1990s, made updated versions of this resource available online for use by teachers and students generally. As freely available materials, they may still be of use. However, as specialists have been aware all along, there are many imperfections in these translations, and I want to make sure that readers are aware that there is now a scholarly alternative, published last month: A Source Book of Ancient Chinese Bronze Inscriptions, edited by Constance Cook and Paul Goldin (Berkeley: Society for the Study of Early China, 2016). The “Source Book” includes translations of over one hundred inscriptions, prepared by ten contributors. I have chosen not to revise the materials here in light of this new resource, even in the case of a few items in the “Source Book” that were contributed by me, because a piecemeal revision seemed unhelpful, and I am now too distant from research on Western Zhou bronzes to undertake a more extensive one. -
Netzplan Region Lenzburg
Netzplan Region Lenzburg Brugg Brugg Zürich HB Industriestrasse Arena 382 Auenstein / Schinznach Dorf 393 Schloss Mägenwil Bahnhof 379 Brunegg Zentrum Wildegg 334 Electrolux Möriken Eckwil Baden 379 Züriacker Bösenrain 530 380 382 Mägenwil Gemeindehaus 381 Brunegg Mägenwil Dorf Wildegg Möriken 334 Bahnhof Zentrum Gemeindehaus Mägenwil Oberäsch Steinler Mägenwil Gewerbepark Aare Wildegg Schürz 530 393 Niederlenz Othmarsingen Dorfplatz Bahnhof 551 Bahnhofstrasse Rupperswil 530 Staufbergstrasse Niederlenz Rössli Othmarsingen Ringstrasse Hetex Militärbetriebe Högern Aarau Rupperswil 394 Nord Traitafina 381 Bahnhof Autobahn- Haldenweg viadukt Gexistrasse Lenzburg Volg Hunzenschwil Bahnhof 381 380 Othmarsinger- Schloss Zofingen Unterdorf Hunzenschwil Schule 382 strasse 391 Hendschiken 394 Lenzhard 393 Alte Bruggerstrasse Hägglingen Korbacker Coop Langsamstig Berufsschule Güterstrasse 391 ChrischonaDottikon 396 Kronenplatz Birkenweg Zeughaus 394 MehrzweckhalleNeuhofstrasse Dufourstr. 396 346 392 Dorfstrasse General Herzog-Strasse 395 Hypiplatz 390 Dottikon-Dintikon 389 Angelrain Dintikon Post- Friedweg Bahnhof Jumbo Fünflinden strasse Beyeler 346345 Oberdorf Augustin Keller-Strasse Ziegeleiweg Weiherweg Staufen Dintikon Post Hunzenschwil Talhard Fünfweiher Gemeindehaus Staufen Lenzburg Wohlen Lindenplatz Dintikon 396 391 392 Schule Chrüzweg Bachstrasse 392 395 Rebrainstrasse Ammerswil 511 390 Dorfplatz Kirche Ober Schafisheim Ausserdorf Ammerswilerstrasse 346 530 dorf Birren Nord Wohlen Schafisheim 389 Ammerswil 530 Gemeindehaus Birren Süd Milchgasse -
Stability of Travel Behaviour: Thurgau 2003
Research Collection Working Paper Stability of Travel Behaviour: Thurgau 2003 Author(s): Löchl, Michael Publication Date: 2005 Permanent Link: https://doi.org/10.3929/ethz-b-000066687 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use. ETH Library Stability of Travel Behaviour: Thurgau 2003 Michael Löchl Travel Survey Metadata Series 16 Travel Survey Metadata Series 16 Stability of Travel Behaviour: Thurgau 2003 Michael Löchl IVT ETH Zürich Zürich Phone: +41 44 633 62 58 Fax: +41 44 633 10 57 [email protected] Abstract Within the project, a six week travel survey has been conducted among 230 persons from 99 households in Frauenfeld and the surrounding areas in Canton Thurgau from August until December 2003. The design built on the questionnaire used in the German project Mobidrive, but developed the set of questions further. All trip destinations of the survey have been geocoded. Moreover, route alternatives for private motorised transport and public transport have been calculated. Moreover, the collected data has been compared with the National Travel Survey 2000 (Mikrozensus zum Verkehrsverhalten 2000), whereas differences in terms of sociodemographic characteristics of the respondents and particularly their travel behaviour couldn't be observed except for an higher proportion of GA and Halbtax ownership. For example, the average trip frequency per person and day is almost the same. In order to check for possible fatigue effects of the amount of reported trips, several GLM (Generalised Linear Model) and poisson regression models have been estimated besides descriptive analysis. -
JEWELS of the EDWARDIANS by Elise B
JEWELS OF THE EDWARDIANS By Elise B. Misiorowski and Nancy K. Hays Although the reign of King Edward VII of ver the last decade, interest in antique and period jew- Great Britain was relatively short (1902- elry has grown dramatically. Not only have auction 1910), the age that bears his name produced 0 houses seen a tremendous surge in both volume of goods distinctive jewelry and ushered in several sold and prices paid, but antique dealers and jewelry retail- new designs and manufacturing techniques. ers alikereportthat sales inthis area of the industry are During this period, women from the upper- excellent and should continue to be strong (Harlaess et al., most echelons of society wore a profusion of 1992). As a result, it has become even more important for extravagant jewelry as a way of demon- strating their wealth and rank. The almost- jewelers and independent appraisers to understand-and exclusive use of platinum, the greater use of know how to differentiate between-the many styles of pearls, and the sleady supply of South period jewelry on the market. African diamonds created a combination Although a number of excellent books have been writ- that will forever characterize Edwardian ten recently on various aspects of period jewelry, there are jewels. The Edwardian age, truly the last so many that the search for information is daunting. The era of the ruling classes, ended dramatically purpose of this article is to provide an overview of one type with the onset of World War I. of period jewelry, that of the Edwardian era, an age of pros- perity for the power elite at the turn of the 19th century.