Low Graphics *

Total Page:16

File Type:pdf, Size:1020Kb

Low Graphics * text/html; charset=UTF-8 (pics-1.1 "http://www.icra.org/pics/vocabularyv03" l gen true for "http://alexandrite.net" r (n 0 s 0 v 0 l 0 oa 0 ob 0 oc 0 od 0 oe 0 of 0 og 0 oh 0 c 1) gen true for "http://www.alexandrite.net" r (n 0 s 0 v 0 l 0 oa 0 ob 0 oc 0 od 0 oe 0 of 0 og 0 oh 0 c 1)) en- gb index,follow,all 14 days Global advanced search,alexandrite search,keyword search,find answers Advanced search Advanced search ALXS-005-00001 Advanced keyword search for Alexandrite Guide Advanced keyword search for Alexandrite Guide Alexandrite.net contributors jc:ALX-027 Accessibility options Switch to preferred accessibility theme: * High contrast * Low graphics * Mobile version * Default theme Increase or decrease the text size: * Safari: View > Make Text Bigger Keyboard navigation and access keys: * A - Accessibility options * 0 - Skip navigation * 1 - Home * 2 - Alexandrite chapters See Alexandrite* 3 - TsarstoneAlexandrite collectors directory guide, Advanced search, http://www.alexandrite.net/viewpage.html?id=ALXS-005-00001 (Advanced keyword search for Alexandrite* Guide)4 - Alexandrite (as of ). forums Page 1 of 6 * 5 - Alexandrite gemstones * 6 - Alexandrite localities * 7 - Contact information * 8 - About Alexandrite Guide * 9 - Sitemap * Press CTRL + access key, then ENTER. Close * Log in or Register * Contacts * About * Q&A * Sitemap Alexandrite Tsarstone collectors guide * Chapters * Chapter 1. Insidious siberian * Chapter 2. Diaphanite or Alexandrite? * Chapter 3. Species and variety * Chapter 4. Classification and properties * Chapter 5. The Alexandrite effect * Chapter 6. World occurrences * Chapter 7. Synthetics and imitations * Chapter 8. Myths, legends and lore * Chapter 9. Alexandrite buyer's guide * Chronological History of Alexandrite * FAQ * Glossary of Terms * Bibliography * Directory * Appraisals (6) * Gemstone dealers (6) * Jewelers (5) * Laboratories (14) * Manufacturers (2) * Museums (2) * Organizations (2) * Publications (3) * Discussion * Tsarstone Museum See Alexandrite Tsarstone collectors guide, Advanced search, http://www.alexandrite.net/viewpage.html?id=ALXS-005-00001 (Advanced keyword search for Alexandrite* Guide)Treasure (as of ). Hunters Page 2 of 6 * Alexandrite Effect * Alexandrite Encyclopedia * Website feedback * Project news * Gemstones * Alexandrite (69) * Chrysoberyl (19) * Chrysoberyl Cats Eye (10) * Localities * Dowerin (Australia) * Carnaiba Mine (Brazil) * Caraiba mine (Brazil) * Serra Dourada (Brazil) * Esmeraldas de Ferros (Brazil) * Novo Cruzeiro (Brazil) * Hematita (Brazil) * Itaitinga Mine (Brazil) * Teofilo Otoni (Brazil) * Deobhog (India) * Ilakaka (Madagascar) * Mogok (Myanmar) * Izumrudnye Kopi (Russia) * Malyshevskoye (Russia) * Balangoda (Sri Lanka) * Horana (Sri Lanka) * Tunduru (Tanzania) * Lake Manyara (Tanzania) * La Madera Mt. (USA) * Girdlestone Farm (Zimbabwe) Home / Search Advanced search with all of the words with the exact phrase with any of the words Show 10 results per page 20 results per page 30 results per page 40 results per page See Alexandrite50 results Tsarstone per collectorspage guide, Advanced search, http://www.alexandrite.net/viewpage.html?id=ALXS-005-00001 (Advanced keyword search for Alexandrite60 results Guide) (as per of ). page Page 3 of 6 70 results per page 80 results per page 90 results per page All results per page Sort by Best match: Keyword relevance Best match: Page rank relevance Page title: A to Z ascending Page title: Z to A descending Publication date: Most recent first Publication date: Most recent last Yes, display results in a new browser window. * See also * References * External links * Comments * Citation * Print options * Bookmark * Send by email Site map See site map at Alexandrite Gemstones Guide www.alexandrite.net/directory/sitemap.html Tags alexandrite book Alexandrite Effect alexandrite engagement ring chatoyancy real alexandrite semi-precious stone acrylite african alexandrite alexandrite alexandrite appraisal alexandrite chrysoberyl alexandrite color alexandrite deposits alexandrite diamond ring alexandrite engagement ring alexandrite gemstone alexandrite jewellery alexandrite jewelry alexandrite mining alexandrite pearl ring alexandrite reference alexandrite ring alexandrite value alexandrites alexandrote jewelry appraisal appraise award bead chrysoberyl Bekily garnet birthstone book Brazilian alexandrite cats eye chrysoberyl chatoyant stone chrysoberyl chrysoberyl cat eye chrysoberyl cat's eye chrysoberyl cats chrysoberyl gem chrysoberyl gems chrysoberyl gemstone chrysoberyl gemstones chrysoberyl jewellery chrysoberyl jewelry chrysoberyl stone color change color change diamond color change garnet color change gemstone color change gemstones color change sapphire color change spinel color fading kunzite colour change stone contact information created alexandrite cymophane diamond Certification EGL emeralds eternity ring eye chrysoberyl fameo fine jewelry garnet gem stones gemstone gemstone identification gemstone jewellery gemstone valuation gemstones See Alexandritehoney gemTsarstone identification collectors guide, Advancedreport search,investment http://www.alexandrite.net/viewpage.html?id=ALXS-005-00001 jewellery jewelry june birthstone june (Advanced birthstone keyword search for Alexandrite Guide) (as of ). june birthstone alexandrite june birthstone colors june gemstone Karl Schmetzer lapidary Page 4 of 6 tools love madagascar alexandrite magazine Malaia garnet malaya garnet mens chrysoberyl ring natural alexandrite natural alexandrite ring natural alxandrite natural chrysoberyl natural cymophane pearl jewellery personally identifiable information pleochroism publisher contacts purkinje shift registered alexandrite valuer Richard W. Wise Russian alexandrite sapphire sapphire jewelry security synethic alexandrite tanzanian alexandrite tavernier diamond vintage alexandrite ring yellow gold alexandrite ring yellowish-green chrysoberyl access keys accessibility acrylite aelxandrite african alexandrite alexandite alexandrite alexandrite chrysoberyl alexandrite chrysoberyl alexandrite classification alexandrite crystal alexandrite deposit alexandrite discovery alexandrite earrings alexandrite effect alexandrite engagement ring alexandrite findings Alexandrite Garnet alexandrite gem alexandrite gems alexandrite gemstone alexandrite guide alexandrite history alexandrite jewellery alexandrite jewelry alexandrite lore alexandrite mine alexandrite mining alexandrite reference alexandrite ring alexandrite rough Alexandrite Specimen alexandrite stone alexandrite stones alexandrite symbol alexandrite value alexandtrite mining alexanrite Alxandrite marquise antique alexandrite appraiser Art Deco alexandrite art deco alexandrite ring bastnaesite bastnasite bead chrysoberyl Bekily Bekily garnet birthstone blue color change garnet blue peacock book Brazilian alexandrite buy alexandrite c ustom jewelry cabochon calibrated gemstones cat's eye cats eye cats eye chrysoberyl chameleon plastic change of color chatoyant stone Chavia Chavia garnet chromium compound chrysoberyl chrysoberyl cat eye chrysoberyl cat's eye chrysoberyl cats chrysoberyl gem chrysoberyl gems chrysoberyl gemstone chrysoberyl gemstones chrysoberyl jewellery chrysoberyl jewelry chrysoberyl localities chrysoberyl rough chrysoberyl stone chrysoberyl varietiy chrysoberyl variety chrysolite collective work color change color change garnet color change garnets color change gemstone color change gemstones color change kunzite color change sapphire color change spinel color change stone color change tourmaline color changing gemstone colored stone colour change Colour change garnet colour change garnets colour change stone contacts contemporary alexandrite ring content license copyrights created alexandrite cymophane czochralski alexandrite depilite device support diamond tools diaphanite dichroism emerald emeralds eternity ring eye chrysoberyl fair use rights faq garnet gem mining gem stones gem variety gemological laboratories gemstone gemstone appraisal gemstone appraiser gemstone globes gemstone hardness gemstone healing gemstone healing properties gemstone meaning gemstone mine gemstone mineral gemstone variety gemstones gemstones valuation genuine alexandrite Girdlestone Farm high contrast honey gem hydrothermal process hydrothermal technique ICGA jewellery jewellery appraisal jewellery valuation jewelry jewelry valuation june gemstone Karl Schmetzer kovuus n.8 om.p n.3.5 alexsandriitti kunzite kyocera alexandrite lab lab created alexandrite laboratory long pulse alexandrite long pulse alexandrite laser loose alexandrite low graphics malaia garnet malaya garnet mark henry alexandrite ring mens chrysoberyl ring mineral chrysoberyl mining australia mining exploration mining resources mobile website natural alexandrite natural alexandrite ring natural chrysoberyl natural cymophane natural russian alexandrite Novello Mine Paulo pegmatite phenomenon pleochroism precious stone See Alexandrite Tsarstone collectors guide, Advanced search, http://www.alexandrite.net/viewpage.html?id=ALXS-005-00001 (Advanced keyword search for Alexandriteprivacy Guide) prophetic (as of ). stone pulse alexandrite pulse alexandrite laser purkinje effect purple q- Page 5 of 6 switched alexandrite q-switched alexandrite laser real alexandrite rhodolite Richard Wise rough chrysoberyl russian alexandite russian alexandrite Russian Alexandrites russian gemstone semi-precious stone simulated gemstone solution growth Spessartite spessartites synethic alexandrite synthetic alexandrite synthetic alexandrite synthetic gem synthetic gemstone synthetic green synthetic stone tri color garnet tri colour garnet tsarina ring tsarstone underground mining urals gemstone Usambara Effect value of alexandrite vapor deposition verneuil flame fusion vintage alexandrite ring widow stone William yellowish-green chrysoberyl Zandrite Home Chapters Directory Discussion Gemstones Localities About us Accessibility Copyright (c) Privacy Q&A Sitemap RSS Sponsored by Multicolour Gems Ltd Design and maintenance by Netcomposite See Alexandrite Tsarstone collectors guide, Advanced search, http://www.alexandrite.net/viewpage.html?id=ALXS-005-00001 (Advanced keyword search for Alexandrite Guide) (as of ). Page 6 of 6.
Recommended publications
  • Gemstones in Metal Clay
    Gemstones in Metal Clay Many natural gemstones can be set into metal clay and fired in place. Other gemstones will not survive the heat of a kiln and should be set after firing. These charts show the results of kiln and torch tests that have been performed on both natural and synthetic gemstones, adapted with permission from the original testing by Kevin Whitmore of Rio Grande. This information is for reference and should be used as a guide. There is always some risk of losing a natural gemstone even if others of it’s kind have survived in the past. Gemstones may have internal flaws that can be liquid or gaseous filled, or contain crystals of other materials that can cause the gemstone to fail where it usually does not. This guide aims to help metal clay artists sort out gemstones that are known to survive under fire from those that are not. Gemstones are minerals that are classified into groups based upon the constancy of their major properties. Each mineral family has one or more varieties contained within the group. When we sort the tested gemstones according to their mineral group, it becomes clear that an easy way to gauge the survivability of a gemstone is to look at the results of other varieties within that same group. Aquamarine and emerald, for example, are both varieties of the beryl group of minerals. The result of tests done on aquamarine and emerald indicate that minerals in the beryl group will not survive kiln heating. There are exceptions, as there always are in the natural world, but in general this method can be reliable for many varieties.
    [Show full text]
  • Reflective Index Reference Chart
    REFLECTIVE INDEX REFERENCE CHART FOR PRESIDIUM DUO TESTER (PDT) Reflective Index Refractive Reflective Index Refractive Reflective Index Refractive Gemstone on PDT/PRM Index Gemstone on PDT/PRM Index Gemstone on PDT/PRM Index Fluorite 16 - 18 1.434 - 1.434 Emerald 26 - 29 1.580 - 1.580 Corundum 34 - 43 1.762 - 1.770 Opal 17 - 19 1.450 - 1.450 Verdite 26 - 29 1.580 - 1.580 Idocrase 35 - 39 1.713 - 1.718 ? Glass 17 - 54 1.440 - 1.900 Brazilianite 27 - 32 1.602 - 1.621 Spinel 36 - 39 1.718 - 1.718 How does your Presidium tester Plastic 18 - 38 1.460 - 1.700 Rhodochrosite 27 - 48 1.597 - 1.817 TL Grossularite Garnet 36 - 40 1.720 - 1.720 Sodalite 19 - 21 1.483 - 1.483 Actinolite 28 - 33 1.614 - 1.642 Kyanite 36 - 41 1.716 - 1.731 work to get R.I. values? Lapis-lazuli 20 - 23 1.500 - 1.500 Nephrite 28 - 33 1.606 - 1.632 Rhodonite 37 - 41 1.730 - 1.740 Reflective indices developed by Presidium can Moldavite 20 - 23 1.500 - 1.500 Turquoise 28 - 34 1.610 - 1.650 TP Grossularite Garnet (Hessonite) 37 - 41 1.740 - 1.740 be matched in this table to the corresponding Obsidian 20 - 23 1.500 - 1.500 Topaz (Blue, White) 29 - 32 1.619 - 1.627 Chrysoberyl (Alexandrite) 38 - 42 1.746 - 1.755 common Refractive Index values to get the Calcite 20 - 35 1.486 - 1.658 Danburite 29 - 33 1.630 - 1.636 Pyrope Garnet 38 - 42 1.746 - 1.746 R.I value of the gemstone.
    [Show full text]
  • Spring 1995 Gems & Gemology
    TABLE CONTENTS FEATURE ARTICLES 2 Rubies from Mong Hsu Adolf Pelsetti, I(ar7 Schmetzer, Heinz-Jiirgen Bernhardt, and Fred Mouawad " 28 The Yogo Sapphire Deposit Keith A. ~~chaluk NOTES AND NEW TECHNIQUES 42 Meerschaum from Eskisehir Province, Turkey I<adir Sariiz and Islcender Isilc REGULAR FEATURES 52 Gem Trade Lab Notes Gem News Most Valuable Article Award Gems ed Gemology Challenge Book Reviews Gemological Abstracts Guidelines for Authors ABOUT THE COVER: One of the most important ruby localities of the 1990s cov- ers a broad orea near the town of Mong Hsu, in northeastern Myann~ar(B~lrrna). The distinctive gemological features of these rubies are detailed in this issue's lead article. The suite of fine jewelry illustraled here contains 36 Mong Hsu rubies with a total weigh1 of 65.90 ct; the two rubies in the ring total 5.23 ct. jewelry courtesy of Mouawad jewellers. Photo by Opass Sultsumboon-Opass Suksuniboon Studio, Bangltolz, Thailand. Typesetting for Gerrls eS Gemology is by Graphix Express, Santa Monica, CA. Color separations are by Effective Graphics, Compton, CA. Printing is by Cadmus lournal Services, Easton, MD. 0 1995 Gemological Institute of America All rights reserved ISSN 0016-626X - Editor-in-Chief Editor Editors, Gem Trade Lab Notes Richard T. Lidtlicoat Alicc S. I<cller Robcrt C. I<ammerling 1660 Stewart St. C. W. Fryer Associate Editors Smta Mon~ca,CA 90404 William E. Boyajian Editors, Gem News (800)421-7250 ~251 Robcrt C. Kamn~erling Rohcrt C. I<ammerling e-mail: altellcrBclass.org D. Vincent Manson John I. Koivula John Sinltanltas Sr~bscriptions Enirnanuel Fritsch Jln Ll~n Editors, Book llevielvs Technical Editor (800) 421-7250 x201 Susan B.
    [Show full text]
  • Download the Scanned
    American Mineralogist, Volume 63, pages 664_676, l97g Multisyste_msanalysis of beryiliumminerar stabilities: the systemBeO-A[rOa_SiO2_H2O DoNer.n M. Bunr Department of Geology, Arizona State (Jniuersitv Tempe,Arizona8528I Abstract seven commonly associatedminerals in the systemBeo-Alror-Sior-Hro includechry- soberyl,phenakite, euclase,bertrandite, beryl, kaolinite,and qiuit . The phaserule implies that not more than six of theseminerals can coexistat an invariantpoint, and, with the addition of an aqueousphase, the associationconstitutes an (n * 4; ptrase(negative two d-egreesof freedom)multisystem. The apparentincompatibility of taotinite with phenakite allowsthe splitting of this unwieldymultisystem into two smaller(n + 3) phasemultisystems, which may belabeled (Kao) and (phe).Moiar volumedata, compuier program RrlcrroN, and naturalassemblages can then be usedto derivethe presumablystabie cJnfiguration of these multisystemson p"-minus an isothermal pHro diagram. n, p-r diagramprojected through theaqueous phase shouldhave the sametopology, and cansimilarlf be drawn. on the resultingdiagrams, three . invariant-butpoinis rabeled tchrl, tBr;;, and [etz] arestable in the.multisystem (Kao), and threedistinct identically-fuU"i.Opoint, u.. stablein rhe multisystem(Phe). An implicationof this topologyvia ihe "r.tu.tubl"-rtable correspon- dence,"is that the assemblagephenakite + euclase* beryl(* aqueousphase) has a finite i'I;ix, ii,l'J.?lT"t' ::ff,,,j :r;: :":.T' ? ts why" euclase is muchrarer than bertrandite. and its stabilityfield, especially
    [Show full text]
  • Weight of Production of Emeralds, Rubies, Sapphires, and Tanzanite from 1995 Through 2005
    Weight of Production of Emeralds, Rubies, Sapphires, and Tanzanite from 1995 Through 2005 By Thomas R. Yager, W. David Menzie, and Donald W. Olson Open-File Report 2008–1013 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director U.S. Geological Survey, Reston, Virginia: 2008 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Suggested citation: Yager, T.R., Menzie, W.D., and Olson, D. W., 2008, Weight of production of emeralds, rubies, sapphires, and tanzanite from 1995 through 2005: U.S. Geological Survey Open-File Report 2008-1013, 9 p., available only online, http://pubs.usgs.gov/of/2008/1013. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. ii Contents Introduction ...................................................................................................................................1 Emeralds.......................................................................................................................................2
    [Show full text]
  • Early Diamond Jewelry See Inside Cover
    ti'1 ;i' .{"n b"' HH :U 3 c-r 6E au) -:L _lH brD [! - eF o 3 Itr-| i:j,::]': O .a E cl!+ r-Ri =r l\+ - x':a @ o \<[SFs-X : R 9€ 9.!-o I* & = t t-Y ry ,;;4 fr o a ts(\ 3 tug -::- ^ ,9 QJH 7.oa : l-] X 'rr l]i @ ex b :<; i-o ld o o-! :. i (n z )@N -.; :!t Fml \"-DF i :\ =orD =\ ^:a -nft< oSr-n ppr= HDV '- s\C r 6- "?tJz* Jlt : ni . s' o c'l.!..4< F' ryl - i o5 F ; {: Ll-l> Fr \ ='/E<- a5. {E j*yt p.y. .o n O S_ sr = = i o - ;iar x'i@ xo ia\=i, -G; t- z i i *O ^ > :.r - : ' - , i--! i---:= -i -z-- l:-\i i- t-3 j'-a : =: S ---i--.-- a- F == :\- O z O - -- - a s =. e ?.a !':ii1 : = - / - . :: i *a !- z : C CI =2 7 \- ^ t =r- l! t! lv- Iv -5 ":. -_r ! c\ co =- \] N TJ ?ti:iE€ i; 5j:; LLI ;;tttE3 E;Ei!iiii'E ri l.T-1 j F-{ i aEE g;iij 1=,iE 3iE;i; ; a;E{ i ii is: :i E-r ''l FJ; l- r s r+ss U f{ r E ci! :?: i; E : nl L *ii;i;i;ili j Eiii!igiaiiiiii il -3€ ;l jii = c-l Le s it5 ;gt,*:ii;$ii; Fi F \JU a .lS IU H\ sit! gi;iig: g lJr )< :,i S i rsr ii: is Ei :n*J f,'i;i;t: a- -r UJ { FJi .i' E-u+Efi€ E sa !E ei E i E F-r tr< ;E;: iE; 3?$s?s t-J ;: z r'l .-u*s re,,r gs E;ig;lii:ii;:ii*5t.! ti:; +-J \ \H trl - L9 \ gEi F-r 'Eq E;*it[; ;i;E iE Hr IE €i;i ! i*;: I tr-r s ct) i EE:i:r! t E;fe; s E;ttsE H;i;{i; sE+ FJ-l S aS H5; e '-\ q/ E th i st*E;iuF€;EEEFi;iE;'a:€:; g F! n1 Ii;:i 3;t g;:s :;sErr; i;:ti i;;i: :E F rt;;;igic; iitiTEi :E ;: r ;ac i; I;; FiE$es;i* Hsi s=+ qE H;{;5FH $;!iiEg tJ L-J S- Nll ^llo.\ ll e*[r+;sir{+giiiE gEa,E s;ee=ltlfFE E5sfr;r ; +rfi [FE 1:8;$ il r;*;rc*€ i'[;*+EI tl ;i ili$;l$s rgiT;i;licE;{ i;E;fi il5! f,r 1l ;lFaE€iHiiifx;a$;as
    [Show full text]
  • Maker-Muse-Addendum-A.Pdf
    Addendum A Maker Muse: Women and Early Twentieth Century Art Jewelry 5/1/2018 Checklist Dimensions Mounting/ Mount Dimensions Case Dimensions Object No. Maker Title Date Media Case # Case Type Value Image H x W x D inches Installing Notes H x W x D inches H x W x D inches INTRODUCTION FC 1/6 FlatTable FC 1/6 Overall 50 1/4 36 20 Case Mrs. Charlotte 1 Pendant 1884-90 2 3/8 x 1 1/2 x 1/4 Gold, amethyst, enamel Mounted into deck - - - Case 38 1/4 36 20 $10,000 Newman Vitrine 12 36 12 Carved moonstone, Mrs. Charlotte Mary Queen of Scots Necklace: 20 1/2 Mounted on riser 2 c. 1890 amethyst, pearl, yellow gold - - - $16,500 Newman Pendant Pendant: 2 3/4 x 1 1/16 on deck chain Displayed in Mrs. Charlotte Necklace: L: 15 3/8 3 Necklace c. 1890 Gold, pearl, aquamarine original box directly - - - $19,000 Newman Pendant: 2 5/8 x 3 15/16 on deck INTRODUCTION - WALL DISPLAY Framed, D-Rings; wall hang; 68 - 72 Alphonse Sarah Bernhardt as 4 c. 1894 Framed: 96 x 41 x 2 Lithograph degrees F, 45 - 55% - - - Wall display $40,000 Mucha Gismonda RH, 5 - 7 foot candles (50 - 70 lux) BRITISH ARTS AND CRAFTS TC 1/10 TC 1/10 Large table Attributed to Overall 83 3/4 42 26 1/2 Gold, white enamel, case Jessie Marion Necklace: 5 11/16 Mounted on oval 5 Necklace c. 1905 chrysoberyl, peridot, green 8 6 1 Table 38 1/4 42 26 1/2 $11,000 King for Liberty Pendant: 2 x 13/16 riser on back deck garnet, pearl, opal & Co.
    [Show full text]
  • GEMSTONES with ALEXANDRITE EFFECT by E
    GEMSTONES WITH ALEXANDRITE EFFECT By E. Gubelin and K. Schmetzer The term alexandrite effect refers to the he alexandrite effect was observed for the first time apparent change of color in certain T in 1830, in a chromium-bearing variety of chryso- minerals from blue-green or greenish beryl from the emerald mines on the eastern slopes of the violet in daylight to red or reddish violet Ural Mountains. The new gem was named by the Swed- in incandescent light. This effect was ish explorer Nils Nordenskiold in 1838 (Koksharov, 1861), discovered in chrome-bearing chrysoberyl in honor of then-Tsarevitch Alexander Nikolayevitch, from the Ural Mountains as early as the beginning of the 19th century. In more the future Tsar Alexander I1 (1818-1881). The alexandrite, recent time's, it has also been observed in famous for its conspicuous change of color-green in day- certain varieties of garnet, corundum, light and red in incandescent light-soon enjoyed great spinel, kyanite, fluorite, and monazite. It popularity as well. This gem was appreciated not only for has been determined that the absorption its curious color change, which has only very recently spectrum of all alexandrite-like minerals been explained (Carstens, 1973; Hassan et al., 1974; is characterized by transmission maxima Gubelin, 1976 a and b; and Schmetzer et al., 1980 a and in the blue-green and red regions and by b) but also because red and green were the colors of the a transmission minimum in the yellow tsarist army; thus the alexandrite was considered by many region. The color of minerals with two to be the national gem of tsarist Russia.
    [Show full text]
  • Volume 35 / No. 1 / 2016
    GemmologyThe Journal of Volume 35 / No. 1 / 2016 The Gemmological Association of Great Britain Save the date Gem-A Conference Saturday 5 and Sunday 6 November 2016 Visit www.gem-a.com for the latest information Join us. The Gemmological Association of Great Britain, 21 Ely Place, London, EC1N 6TD, UK. T: +44 (0)20 7404 3334 F: +44 (0)20 7404 8843. Registered charity no. 1109555. A company limited by guarantee and registered in England No. 1945780. Registered Office: 3rd Floor, 1-4 Argyll Street, London W1F 7LD. Conference_03-2016_March-April_Save The Date_A4.indd 1 12/04/2016 10:44:17 Contents GemmologyThe Journal of Volume 35 / No. 1 / 2016 COLUMNS p. 22 1 What’s New DiamondDect for diamond identification|Triple D photo kit|Upgraded Diamond- View|Variofoc LED lighting system|AGTA Tucson seminars| Responsible sourcing of coloured stones report|World Gold Council report|GSJ 2015 Annual Meeting abstracts|ICGL Newsletter|Large CVD synthetic diamond seen p. 64 by HRD Antwerp|MAGI diamond type report|SSEF Facette|Updated Journal cumulative index|Wyoming jade report|GemeSquare app and GemePrice 5.0|Historical reading lists|Hyperion inclusion search engine|Gems from the French Crown Jewels exhibit ARTICLES 6 Gem Notes Apatite from Iran|Purple apa- Feature Articles tite from Namibia|Cordierite from Madagascar|Emerald 28 Characterization of Oriented Inclusions in Cat’s-eye, and pyrite mixture from Co- Star and Other Chrysoberyls lombia|Garnet from Mahenge, By Karl Schmetzer, Heinz-Jürgen Bernhardt and H. Albert Gilg Tanzania|Grandidierite from
    [Show full text]
  • Trapiche Tourmaline
    The Journal of Gemmology2011 / Volume 32 / Nos. 5/8 Trapiche tourmaline The Gemmological Association of Great Britain The Journal of Gemmology / 2011 / Volume 32 / No. 5–8 The Gemmological Association of Great Britain 27 Greville Street, London EC1N 8TN, UK T: +44 (0)20 7404 3334 F: +44 (0)20 7404 8843 E: [email protected] W: www.gem-a.com Registered Charity No. 1109555 Registered office: Palladium House, 1–4 Argyll Street, London W1F 7LD President: Prof. A. H. Rankin Vice-Presidents: N. W. Deeks, R. A. Howie, E. A. Jobbins, M. J. O'Donoghue Honorary Fellows: R. A. Howie Honorary Life Members: H. Bank, D. J. Callaghan, T. M. J. Davidson, J. S. Harris, J. A. W. Hodgkinson, E. A. Jobbins, J. I. Koivula, M. J. O’Donoghue, C. M. Ou Yang, E. Stern, I. Thomson, V. P. Watson, C. H. Winter Chief Executive Officer: J. M. Ogden Council: J. Riley – Chairman, S. Collins, B. Jackson, S. Jordan, C. J. E. Oldershaw, L. Palmer, R. M. Slater Members’ Audit Committee: A. J. Allnutt, P. Dwyer-Hickey, E. Gleave, J. Greatwood, G. M. Green, K. Gregory, J. Kalischer Branch Chairmen: Midlands – P. Phillips, North East – M. Houghton, North West – J. Riley, South East – V. Wetten, South West – R. M. Slater The Journal of Gemmology Editor: Dr R. R. Harding Deputy Editor: E. A. Skalwold Assistant Editor: M. J. O’Donoghue Associate Editors: Dr A. J. Allnutt (Chislehurst), Dr C. E. S. Arps (Leiden), G. Bosshart (Horgen), Prof. A. T. Collins (London), J. Finlayson (Stoke on Trent), Dr J.
    [Show full text]
  • Table of Contents
    CHARACTERIZATION OF VIBRATIONAL AND ELECTRONIC FEATURES IN THE RAMAN SPECTRA OF GEM MINERALS by Renata Jasinevicius A Prepublication Manuscript Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE In the Graduate College THE UNIVERSITY OF ARIZONA 2009 ii ACKNOWLEDGMENTS This work could not have been completed without the sponsorship of the Israel Diamond Institute (IDI). A special thanks to the following contributors for making this work possible: James Shigley, Ph.D.-Gemological Institute of America (GIA) Dr. M. Bonner Denton-University of Arizona, Dept. of Chemistry Bear Williams, Stone Group Labs (photos) Tom Tashey-Professional Gem Sciences, Inc. Charlene Estrada, photography Sue Robison, RRUFF Project, University of Arizona To my advisor, Bob Downs, you have challenged me in new ways and taught me how to network. You have helped me fine tune my writing skills and master the art of thinking scientifically. You have made me a better student and opened doors for my future. Thank you. I’d like to extend my gratitude to all the people who provided me with personal support and encouragement throughout my academic career: To my future husband, Jason Lafler, I never would have made it without you. I am the luckiest lady in the world. Madison Barkley, you are a dear friend, and having you in my life made all of my graduate school experiences more memorable. To my mentor and friend, Elizabeth Gordon, your guidance has helped me become the person I am today. You are an inspirational teacher and I appreciate everything you have done for me.
    [Show full text]
  • Glossary of Jewellery Making and Beading Terms
    Glossary of Jewellery Making and Beading Terms A jewellery glossary of beading terms and jewellery making terminology combining clear images with easy to understand dictionary like definitions. This bead glossary also provides links to more in depth content and bead resources. It can be used as a beading A to Z reference guide to dip into as needed, or as a beading and jewellery glossary for beginners to help broaden beading and jewellery making knowledge. It is particularly effective when used alongside our Beading Guides, Histories, Theories and Tutorials, or in conjunction with our Gemstones & Minerals Glossary and Venetian Glass Making Glossary. A ABALONE These edible sea creatures are members of a large class of molluscs that have one piece shells with an iridescent interior. These shells have a low and open spiral structure, and are characterized by several open respiratory pores in a row near the shell’s outer edge. The thick inner layer of the shell is composed of a dichroic substance called nacre or mother-of-pearl, which in many species is highly iridescent, giving rise to a range of strong and changeable colors, making it ideal for jewellery and other decorative objects. Iridescent nacre varies in colour from silvery white, to pink, red and green- red, through to deep blues, greens, and purples. Read more in our Gemstones & Minerals Glossary. Above are examples of Paua and Red Abalone. ACCENT BEAD Similar in purpose to a Focal Bead, this is a bead that forms the focus for a piece of jewellery, but on this occasion rather then through its size, it is usually through contrast.
    [Show full text]