DOCSLIB.ORG

Spring 1988 Gems & Gemology

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Spring 1988 Gems & Gemology EDITORIAL Editor-in-Chief Editor Editor, Gem Trade Lab Notes STAFF Richard T. Liddicoat Alice S. Keller C. W. Frver Associate Editors I660 Stewart St. Editor, Gemological Abstracts Santa Monica, CA 90404 Peter C. Keller Dona M. Dirlam Telephone: (800)421-7250 x25 1 D. Vincent Manson Editor, Book Reviews John Sinltankas Subscriptions Elise B. Misiorowslzi Lisa Hebenstreit, Manager Technical Editor Bruce Tucker, Asst. Manager Contributing Editor, John I. Koivula Carol M. Stockton Telephone: [800! 421-7250 x201 Editors, Gem News Editorial Assistant John I. Koivula Nancy K. Hays Robcrt C. Kammerling PRODUCTION Jennifer Brosious Julie Matz Cccile Miranda STAFF Linda Manion Patricia Mayer Ruth Patchick Susan Kingsbury Jan Newcll Peter Johnston EDITOR14 William E. Boyajian Robcrt C. Kammerling Sallie Morton REVIEW BOARD Sonto Monico, CA Sontrl Monico. CA San lose, CA Robert Crowningshield Anthony li. Kampf Kurt Nassau New York, NY Los Angeles, CA Bernardsvllle, N/ Dennis Foltz Robert E. K~ne Ray Page Santo Monica, CA Los Angeles, CA Santa iMonlco, CA C. W. Fryer John I. Koivula George Rossman Santa Monica, CA S~ntrl/Monica, CA Posodenn, CA C. S. Hurlbut, Jr. Henry 0. A. Meycr James E. Shiglcy Cambridge, IMA West Lalayette, IN Sonia ~Monlca,CA SUBSCRIPTIONS Subscrip~ionsin the U.S.A. are priced as follows: $32.95 for onc ycar (4 issues), $89.95 for thrce ycars (12 issues) Subscriptions sent clscwherc arc S42.00 for onc year, S120.00 for three years. Special a~inualsubscripti011 rates are available for all students actively involved in a GIA program: $29.95 U.S.A., $39.00 elsewhere. Yoor student number must be listed at the time your subscription is entcred. Single issues may be purchased for S8.50 in the U.S.A., $1 1.50 elsewhere. Discounts are given for bulk orders of 10 or more of ally one issue. A limited nomber of back issues of G&G are also available for purchase. Please address all inquiries regarding subscriptions and the purchase of single copies or back issues to the Subscriptions Manager. For subscriptions and back Issues in Italy, please contact Istituto Gemmologico ~Mediterraneo,Via Marmola~a#14, 1-38033, Cavalese TN, Italy. To obtain a Japanese translation of Gems d Gemology, contact the Association of Japan Gem Trust, Okachimachi Cy Bldg, 5-15-14 Ueno, Taito-ku, Tokyo 110, Japan. MANUSCRIPT Gems Gemology welcomes the submission of articles on all aspects of the field. Please see the Suggestions SUBMISSIONS for Authors in the Fall 1987 issue of the journal, or contact the edi~orfor a copy. Letters on articles published in Gems d Gernology and other relevant matters are also welcome. COPYRIGHT Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond thc limits of U.S. AND REPRINT copyright law for private use of patrons. Instructors are permitted to photocopy isolated artlcles for noncom~nercial PERMISSIONS classroom use without fee. For other copying, reprint, or republication permission, please coiltact thc Editor. Gerns d Gemology is published quarterly by the Gemological Institute of Amcrica, a nonprofit educational organization for the jewelry industry, I660 Stewart St., Santa ~Monica,CA 90404. Postmaster: Return undeliverable copies of Gems 01 Ge~nologyto I660 Stewart St., S:~nta Mon~ca,CA 90404. Any opin~onscxpressed In slgned art~clcsare undcrs~oodto be the vlews of the authors and not of thc publ~shers. SPRING 1988 Volume 24 Number '1 TABLE OF CONTENTS EDITORIAL 1 Retrospective 1987lThe Gems & Gemology Most Valuable Article Award Alice S. Ikller FEATURE 3 An Update on Color in Gems. ARTICLES Part 2: Colors Involving Multiple Atoms and Color Centers Emmonuel Fritsch and George R. Rossmon 16 Chrysoberyl and Alexandrite from the Pegmatite Districts of Minas Gerais, Brazil Keith Proctor 33 Faceting Large Gemstones Michoel Gray NOTES 44 The Distinction of Natural from Synthetic AND NEW Alexandrite by Infrared Spectroscopy TECHNIQUES Carol M. Stockton and Robert E. Kane REGULAR 47 Gem Trade Lab Notes FEATURES 54 Gems & Gemology Challenge 56 Gem News 60 Book Reviews 62 Gemological Abstracts ABOUT THE COVER: This 175-ct sapphire is exceptional for both its color nntl its size. The blue color is the result of I:e2++TP+ intervnlence charge trnnsfer, one of the color-crrusing mechnnisrns discussetl in the secontl article of n three-port series on color in gemstones. In this issue, Drs. Fritsch nl~dRoss~nan review cnuses of color that involve more than one atom, ns well ns those brought about by various defects. The snpphire pendnnt, set with 17 ct of diamonds oncl suspended from a necltlnce of 8-8.5 mm cultured penrls, is courtesy o/ Roger Farr-Pnrk/Allbritton. Photo O Hnrold el Ericn Von Pelt-Photographers, Los Angeles, CA. Typesetting for Gems Ck Gemology is by Sclcntific Composition, Los Angeles, CA. Color separations are by Effective Graphics, Compton, CA. Printing is by Wuverly Press, Easton, MD. 8 1988 Gemological Institute of America All rights reserved ISSN 001 6-626X RETROSPECTIVE 1987 Undeniably, 1987 was yet another watershed year in gemology. In diamonds, a 0.95-ct fancy purplish red round brilliant-cut sold for $880,000-a record per-carat price of $926,000. I11 synthetic diamonds, not only did the first Sumitomo gem-quality synthetic diamonds appear on the gem marlzet, but De Beers released information revealing just how far their experiments with gem-quality synthetic diamonds had progressed; one such crystal tipped the scale at over 11 ct. Perhaps the biggest news in colored stones last year was the discovery of a major find of superb alexandrites near the town of Hematita in Minas Gerais, Brazil; in less than three months in 1987, more than 50 kg of gem-quality alexandrites were taken from this small deposit before it was closed because of the violence that ensued. As for synthetic colored stones, producers continue to proliferate and even materials such as malachite are no longer beyond our technical capabilities. To help in the continuing battle to identify new synthetics and gein treatments as soon as they emerge on the marlzet, sophisticated technology such as infrared spectroscopy is now being applied to a wide variety of gemological problems. All of these topics, and many others, were covered in the 1987 volume of Gems d Gemology And a detailed description of the remarkable Heinatita alexandrite find is provided in this issue. We are pleased that Gems d Gemology continues to be, in the words of one of our readers, "absolutely essential to anyone in the busineps of jewelry." We would lilze to thank the inembers of our editorial review board, our very special section and techscal editors, and the photographers and graphic artists who are responsible for building this' rkputation. THE GEMS & GEMOLOGY MOST VALUABLE ARTICLE AWARD We are also pleased to have this opportunity to recognize some of the many authors who, in 1987, helped inalze Gerns d Gemology such a vital information source. The overwhelming choice of our readers for first place in the most valuable article award is "Gemstone Durability: Design to Display," by Deborah Martin. The response to this article was so strong that GIA has now released a laminated version of the chart of durability considerations for 31 gem species. Second place goes to the first in a three-part series that seelzs to explain, in terms that the jeweler/gen~ologistcan readily understand, the causes of color in gem materials: 'An Update on Color in Gems. Part 1: Introduction and Colors Caused by Dispersed Metal Ions," by Emmanuel Fritsch and George Rossman. The current importance of yellow sapphire and the questions regarding its color stability were evident in the selection of the third-place article: "The Seven Types of Yellow Sapphire and Their Stability to Light," by Kurt Nassau and G. Kay Valente. Cash prizes of $500, $300, and $100, respectively, will be shared by the authors of the first-, second-, and third-place articles. Brief biographies of the winning authors appear on the following page. Alice S. Keller, Editor Editorial GEMS 6: GEMOLOGY Spring 1988 1 THE WINNERS DEBORAH DUPONT MARTIN Ms. Martin began her jewelry career in retail sales and management, but quickly realized that her real interest was design and manufacturing. After several years as a bench jeweler, her love of gemstones brought her to the Gemological Institute of America, Santa Monica, where she received her Graduate Gemologist degree and subsequently taught in the Colored StonesIGem Identification Department of the Resident Program. A native of Oklahoma, Ms. Martin is currently a staff gemologist with the GIA Gem Trade Laboratory, Inc., Los Angeles. EMMANUEL FRITSCH Dr. Fritsch studied engineering geology in Nancy, in eastern France, before moving to Paris, where he received his Ph.D. at the Sorbonne. He is currently a research scientist at GIA Santa Monica. A gemstone enthusiast for many years, Dr. Fritsch's research specialities are twinned crystals and the origin of color in gem materials. GEORGE R. ROSSMAN Dr. Rossman received his B.Sc. degree from Wisconsin State University, Eau Clair, and his Ph.D. (in chemistry] from the California Institute of Technology, 13asadena, where he is now professor of mineralogy. His current research studies involve the origin of color phenomena in minerals and the physical and chemical properties of minerals. He is also investigating how long-term natural background radiation can affect minerals. KURT NASSAU Dr. Nassau's work at the Materials Laboratory of AT&T Bell Laboratories includes active involvement in research on crystal growth and the chemistry of solid-state materials. Currently, Dr. Nassau is studying quenched and conventional glasses and crystals for electronic and fiber-optic applications as well as high-temperature superconductors.
Load more

Recommended publications
  • Stibiotantalite Sb(Ta, Nb)O4 C 2001-2005 Mineral Data Publishing, Version 1
    Stibiotantalite Sb(Ta, Nb)O4 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: mm2. Crystals prismatic k [010], flattened k to [001], may be equant, to 12 cm; {001} and {101} striated k [010]. Twinning: About [010] with composition plane {001}; polysynthetic. Physical Properties: Cleavage: {001}, distinct; {100} indistinct. Fracture: Subconchoidal. Tenacity: Brittle. Hardness = 5.5 D(meas.) = 7.53 (synthetic SbTaO4). D(calc.) = [7.58] Strongly pyroelectric. Optical Properties: Semitransparent. Color: Dark brown to light yellowish brown; reddish yellow, reddish brown, greenish yellow; in transmitted light, pale yellow-brown to brown, may be zoned. Streak: Pale yellow to yellow-brown. Luster: Resinous to adamantine. Optical Class: Biaxial (+). Orientation: X = a; Y = b; Z = c. Dispersion: r< v,strong. α = 2.374 β = 2.404 γ = 2.457 2V(meas.) = n.d. 2V(calc.) = 75◦50 Cell Data: Space Group: Pc21n (synthetic SbTaO4). a = 4.911 b = 11.814 c = 5.535 Z=4 X-ray Powder Pattern: Synthetic SbTaO4; nearly identical to stibiotantalite. 3.121 (100), 3.506 (38), 2.950 (34), 2.687 (22), 2.692 (21), 1.735 (19), 1.888 (17) Chemistry: (1) (2) (3) Nb2O5 1.79 11.3 Ta2O5 57.29 43.3 60.25 SiO2 0.1 Sb2O3 40.64 40.3 39.75 Bi2O3 0.30 3.8 CaO 0.1 Total 100.02 98.9 100.00 (1) Greenbushes, Western Australia. (2) Mesa Grande district, California, USA; by electron microprobe, corresponding to Sb1.00(Ta0.71Nb0.30)Σ=1.01O4. (3) SbTaO4. Mineral Group: Forms a series with stibiocolumbite.
    [Show full text]
  • 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]
  • Bismutotantalite-Stibiotantalite-Stibiocolumbite Assemblage from Elbaite Pegmatites at Molo Near Momeik, Northern Shan State, Myanmar
    Bismutotantalite-stibiotantalite-stibiocolumbite assemblage from elbaite pegmatites at Molo near Momeik, northern Shan State, Myanmar Novák Milan, Sejkora Jiří, Škoda Radek and Budina Václav With 5 figures and 2 tables Abstract: Bismutotantalite-stibiotantalite-stibiocolumbite (BSS) aggregates occur exclusively in pockets of the elbaite subtype pegmatites cutting serpentinized peridotite at Khetchel village, Molo quarter near Momeik Township, northeast of Mogok, Shan State, Myanmar (Burma). The pegmatites exhibit simple zoning with common pockets lined with K-feldspar, “mushroom-like” pink to red elbaite, beryl (aquamarine, morganite), petalite, phenakite, quartz, saccharoidal albite, adularia, hambergite and cookeite(?). The BSS aggregates consist of prismatic crystals of bismutotantalite-stibiotantalite (Bi/(Bi+Sb) = 0.47-0.51; Ta/(Ta+Nb) = 0.64-0.67; a = 5.6017(3), b = 11.7802(3), c = 4.9497(3) Å and V = 326.63(2) Å3), up to about 5 mm in size, and their aggregates, up to 3 cm in diameter, forming ~ 95 vol.% of the overall BSS aggregate. Oval to irregular grains blebs of stibiotantalite (Bi/(Bi+Sb) = 0.04-0.08; Ta/(Ta+Nb) = 0.62-0.68), up to 100 μm in diameter, scarcely occur in bismutotantalite-stibiotantalite. Thin veinlets of stibiocolumbite (Bi/(Bi+Sb) = 0.01-0.05; Ta/(Ta+Nb) = 0.40-0.49) with brecciated textures, up to 30 μm thick, cut bismutotantalite-stibiotantalite and rarely also stibiotantalite blebs. Two distinct compositions were found in the stibiocolumbite veinlets, W-poor and rare W-rich (up to 19.34 wt.% WO3). Late stibiocolumbite overgrowths (Bi/(Bi+Sb) = 0.01-0.03; Ta/(Ta+Nb) = 0.17-0.33) on crystals of bismutotantalite-stibiotantalite reach up to 20 μm in size.
    [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]
  • New Mineral Names*,†
    American Mineralogist, Volume 106, pages 1186–1191, 2021 New Mineral Names*,† Dmitriy I. Belakovskiy1 and Yulia Uvarova2 1Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18 korp. 2, Moscow 119071, Russia 2CSIRO Mineral Resources, ARRC, 26 Dick Perry Avenue, Kensington, Western Australia 6151, Australia In this issue This New Mineral Names has entries for 10 new species, including huenite, laverovite, pandoraite-Ba, pandoraite- Ca, and six new species of pyrochlore supergroup: cesiokenomicrolite, hydrokenopyrochlore, hydroxyplumbo- pyrochlore, kenoplumbomicrolite, oxybismutomicrolite, and oxycalciomicrolite. Huenite* hkl)]: 6.786 (25; 100), 5.372 (25, 101), 3.810 (51; 110), 2.974 (100; 112), P. Vignola, N. Rotiroti, G.D. Gatta, A. Risplendente, F. Hatert, D. Bersani, 2.702 (41; 202), 2.497 (38; 210), 2.203 (24; 300), 1.712 (60; 312), 1.450 (37; 314). The crystal structure was solved by direct methods and refined and V. Mattioli (2019) Huenite, Cu4Mo3O12(OH)2, a new copper- molybdenum oxy-hydroxide mineral from the San Samuel Mine, to R1 = 3.4% using the synchrotron light source. Huenite is trigonal, 3 Carrera Pinto, Cachiyuyo de Llampos district, Copiapó Province, P31/c, a = 7.653(5), c = 9.411(6) Å, V = 477.4 Å , Z = 2. The structure Atacama Region, Chile. Canadian Mineralogist, 57(4), 467–474. is based on clusters of Mo3O12(OH) and Cu4O16(OH)2 units. Three edge- sharing Mo octahedra form the Mo3O12(OH) unit, and four edge-sharing Cu-octahedra form the Cu4O16(OH)2 units of a “U” shape, which are in Huenite (IMA 2015-122), ideally Cu4Mo3O12(OH)2, trigonal, is a new mineral discovered on lindgrenite specimens from the San Samuel turn share edges to form a sheet of Cu octahedra parallel to (001).
    [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]
  • Title Studies on the Metamictization of Radioactive Minerals Author(S
    Title Studies on the Metamictization of Radioactive Minerals Author(s) Ueda, Tateo Memoirs of the College of Science, University of Kyoto. Series Citation B (1957), 24(2): 81-120 Issue Date 1957-10-15 URL http://hdl.handle.net/2433/258495 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University MEMolRS oF r!{E ComEGE oF SclENcE, UNIvERslTy OF KyoTo, SERIEs B, Vol. XXIV, No. 2 Geology and Minera!ogy, Article 1, 1957 Studies oR the Metamictization of Radioactive Minerals By [rateo UEDA Geological and Mineralogical Institute, University of Kyoto (Received June 29, 1957) Abstract Radioactive minerals are melted, portion by portien, by the irradiation arising from dis- integration of the radioactive elements contained in these minera}s. The melted portion solidifies later on. The solidification occurres in twe ways. One is that taking place in an original crystalline phase and in this case metamictization dees not proceed, the other is that not doing and in this case metamictization proceeds. !ntroduetion Mest of radioactive minerals are in the course of time transformed into a metamict state. In a metamict state lattices are broken down and the minera}s are amorphous, retaining their crystal forms. As the agent causing the metamict state is accepted the irradiation arising from disintegration of the radioactive elements contained in the minerals. Since, however, certain radioactive minerais have not been found in an amorphous state, there must be another agent in the metamicti- zation. Recently, much of the interest in irradiation effects has been aroused by the increasing need for shielding materials suitable for the applications of nuclear science.
    [Show full text]
  • Zircon, Monazite and Other Minerals Used in the Production of Chemical Com- Pounds Employed in the Manufac- Ture of Lighting Apparatus
    North Carolina State Library GIFT OF \*J.^. M «v* Digitized by the Internet Archive in 2013 http://archive.org/details/zirconmonaziteot25prat V C*> ttonh Carolina Stat© ^vtef <^ Raleigh NORTH CAROLINA GEOLOGICAL AND ECONOMIC SURVEY JOSEPH HYDE PRATT, State Geologist BULLETIN No. 25 Zircon, Monazite and Other Minerals Used in the Production of Chemical Com- pounds Employed in the Manufac- ture of Lighting Apparatus BY JOSEPH HYDE PRATT, Ph.D. Raleigh, N. 0. Edwards & Broughton Printing Co. State Printers and Binders 1916 GEOLOGICAL BOARD Governor Locke Craig, ex officio chairman Raleigh Frank R. Hewitt Asheville Hugh MacRae Wilmington Henry E. Fries ". Winston-Salem John Sprunt Hill Durham Joseph Hyde Pratt, State Geologist Chapel Hill ^5 LETTER OF TRANSMITTAL Chapel Hill, M". C, October 1, 1915. To His Excellency , Honorable Locke Craig, Governor of North Carolina. Sir :—I have the honor to submit herewith for publication as Bulletin 25 a report on Zircon, Monazite and other Minerals Used in the Pro- duction of Chemical Compounds Employed in the Manufacture of Light- ing Apparatus. There is a renewed interest in the deposits of these min- erals in North Carolina, and the present report takes up not only a description of the localities in which these minerals are found, but is a technical review of the development of the lighting industry. Very truly yours, Joseph Hyde Pratt, State Geologist. ±o 5 ,3 3 2 7 CONTENTS PAGE Introduction 7 Zircon 7 Sources of Zirconia 10 Zircon 10 Baddeleyite 10 Other Zirconia-bearing Minerals 11 Occurrences and localities of Zircon 13 Zircon from Henderson County, N.
    [Show full text]