G&G Data Depository

This depository contains material that is supplementary to articles published in Gems & Gemology. Detailed descriptions of methods, extensive tabular material, and additional data or images may be submitted by authors and/or recommended by the editors for inclusion in the depository. Important Note: Depository material has not undergone the full G&G review/revision process. Questions on depository items should be directed to the person who submitted the item.

• Source: Benjamin Rondeau et al., "Characterization of Emeralds from a Historical Deposit: Byrud (Eidsvoll), Norway," Summer 2008, pp. 108–122.
  Table 1: Minerals Associated with Byrud Emerald and Their Relative Abundance
  Table 2: Details of the LA-ICP-MS Analyses of Three Byrud Emeralds
  Table 3: Chemical Composition of Norwegian Emeralds by Electron Microprobe
  Submitted by Benjamin Rondeau

• Source: Shane F. McClure and Andy H. Shen, "Coated Tanzanite," Summer 2008, pp. 142–147.
  LA-ICP-MS Analyses of Si, Co, Sn, Pb, and Zn
  Submitted by Andy H. Shen

• Source: Brendan Laurs et al., "Copper-bearing (Paraíba-type) Tourmaline from Mozambique," Spring 2008, pp. 4–30.
  Table 1: Average Chemical Composition of 59 Cu-bearing Tourmaline Samples from Mozambique
  Table 2: Supplementary Data: X-Y Data for Absorption Spectra of Cu-bearing Tourmaline from Mozambique
  Submitted by David Kondo

• Source: Eloïse Gaillou and Jeffrey E. Post, "An Examination of the Napoleon Diamond Necklace," Winter 2007, pp. 352–357.
  Table:Type and Description of the Luminescence for the 52 Main Diamonds in the Napoléon Necklace
  Submitted by Eloïse Gaillou

• Source: Brendan Laurs et al., "Yellow Mn-rich Tourmaline from the Canary Mining Area, Zambia," Winter 2007, pp. 314–331.
  Table: Electron-Microprobe Analyses of Tourmaline from the Canary Mining Area, Zambia
  Submitted by Brendan Laurs

• Source: Sally Eaton-Magaña et al., "Fluorescence Spectra of Colored Diamonds Using a Rapid, Mobile Spectrometer," Winter 2007, pp. 332–351.
  Map of Tested Diamonds in the Aurora Butterfly Collection
  Table: Summary of Phosphorescence Results
  Submitted by Sally Eaton-Magaña

• Source: Mary L. Johnson, "Durability Testing of Filled Emeralds," Summer 2007, pp. 120–137.
  Addendum: Historical Background: Mining, Emerald Treatments, and Treatment Determination
  Table: Samples of Fracture-Filled Emeralds Examined by Various Durability Tests
  Submitted by Mary L. Johnson (mlj@cox.net).

• Source: A.J.A. (Bram) Janse, "Major Diamond Mines of the World: Tectonic Location, Production, and Value," Fall 2006, pp. 148–149.
  Submitted by A.J.A. (Bram) Janse (archonexpl@iinet.net.au)
  
  The tables submitted in conjunction with this abstract have been superseded by data published in A.J.A. (Bram) Janse, "Global Rough Diamond Production since 1870," Summer 2007, pp. 98-119.  

• Source: "Gem News International: "Color-Change from Bastnäsite-(Ce) from Pakistan," Summer 2007, pp. 165–166.
  Additional figures (7/30/07)
  Submitted by Laurent Massi

• Source: Sylvia M. Gumpesberger, "Magnetic Separation of Gemstones," Fall 2006, p. 124.
  Table: Magnetic Characteristics of Various Gem Materials Observed by the Direct Method
  Submitted by Sylvia M. Gumpesberger (sgumpesberger@hotmail.com )

• Source: Joe C.C. Yuan et al., "Investigation by Synchrotron X-ray Diffraction Topography of the Crystal Structure Defects in Colored Diamonds (Natural, Synthetic, and Treated)," Fall 2006, p. 93.
  Table: Degree of Defect Formation in Natural, Synthetic, and Treated Diamond Samples
  Submitted by Joe C.C. Yuan (joeyuan@solstargd.21cn.com)

• Source: Paul Johnson et al.,"Lab Notes: Bone Pendant," Summer 2006, pp. 160–161.
  Additional Figures (6/16/06)
  Submitted by Paul Johnson

• Source: Robert E. Kane et al., "A Gemological Pioneer: Dr. Edward J. Gübelin," Winter 2005, pp. 298–327.
  Chronological Bibliography of Articles by Edward J. Gübelin (1/18/06)
  Submitted by Robert E. Kane 

• Source: Shane F. McClure et al., "Gem News International: Tenebrescent scapolite from Afghanistan," Fall 2005, pp. 269–271.
  Video Showing Tenebrescence in Scapolite from Afghanistan (10/18/05)
  Connection Speed: [Low 56k] [Med 100k] [Hi 256k]
  Submitted by Brendan M. Laurs (blaurs@gia.edu)
  
  Note: You will need to have the free QuickTime player installed on your computer to view this video clip. To download QuickTime, click here.

• Source: J.C. Zwaan et al., "Emeralds from the Kafubu Area, Zambia," Summer 2005, pp. 116–148.
  Table 1: Local Geological Terminology for the Kafubu Emerald Area (8/18/05)
  Table 2: Chemical Composition of Zambian Emeralds by Electron Microprobe (8/18/05)
  Figure: Fluid Inclusions in Zambian Emerald Containing CO₂ and CH₄ (8/18/05)
  Submitted by Brendan M. Laurs (blaurs@gia.edu)

• Source: Thomas M. Moses et al., "A Foundation for Grading the Overall Cut Quality of Round Brilliant Cut Diamonds," Fall 2004, pp. 202–228.
  Acknowledgments (10/07/04)
  Table 1: Summary of Viewing Hemispheres Developed During Research of the Brightness Metric (10/07/04)
  Table 2: Summary of Brightness and Fire Metrics (10/07/04)
  Submitted by Barak Green (barak.green@gia.edu)

• Source: Brendan M. Laurs, William "Skip" Simmons, and Alexander Falster, "Gem News International: Gem Tourmaline from Congo," Fall 2004, pp. 263–265.
  Congo tourmaline analyses by electron microprobe
  Table 1: Slices
  Table 2: Crystals (Blue to Green)
  Submitted by Brendan M. Laurs (blaurs@gia.edu)

• Source: Thomas W. Overton, "Gem Treatment Disclosure and U.S. Law," Summer 2004, pp. 106–127.
  Appendix A: Excerpts from the FTC Guides
  Capsule Descriptions of Cited Cases
  U.S. State Laws Governing Deceptive Trade Practices and Gem Disclosure Obligations
  Submitted by Thomas W. Overton (tom.overton@gia.edu)

• Source: Vladimir S. Balitsky et al., "The 3543 cm^-1 Infrared Absorption Band in Natural and Synthetic Amethyst and Its Value in Identification," Summer 2004, pp. 146–161.
  Table 1: Presence or Absence of the 3543 cm-1 Absorption Band in Synthetic Quartz According to Growth Conditions
  Submitted by Vladimir S. Balitsky (balvlad@iem.ac.ru)

• Source: Thomas W. Overton, "Gem News International: Update on Proprietary Diamond Cuts," Spring 2004, pp. 75–76.
  Table of Proprietary/Patented Diamond Cuts (last updated April 2005)
  Submitted by Thomas W. Overton (tom.overton@gia.edu)

• Source: Brendan M. Laurs et al., "Pezzottaite from Ambatovita, Madagascar: A New Gem Mineral," Winter 2003, pp. 268–283.
  Table 1: Electron-Microprobe Analyses of Pezzottaite Done at the University of New Orleans (1/20/04)
  Table 2: Mn, Fe, and Ti Abundances in Pezzottaite and Red and Pink Beryls (1/20/04)
  Spectra: IR Absorption, Raman, and X-ray Diffraction (1/20/04)
  Submitted by: Brendan M. Laurs (blaurs@gia.edu)

• Source: Thomas M. Moses and James E. Shigley, "G. Robert Crowningshield: A Legendary Gemologist," Fall 2003, pp. 184–199.
  Presentations at AGS Conclaves by G. Robert Crowningshield (10/30/03)
  Submitted by: Thomas M. Moses and James E. Shigley (jshigley@gia.edu)

• Source: John L. Emmett et al., “Beryllium Diffusion of Ruby and Sapphire,” Summer 2003, pp. 84–135.
  Table 1: Samples Used for Gemological Characterization (07/30/03)
  Table 2: Trace-Element Compositions of Be-Diffused and Natural-Color Corundum Determined Using SIMS (ppma) (07/30/03)
  Table 3: Durability and Stability of the Treatment in Be Lattice Diffusion–Treated Orange to Pinkish Orange Sapphires (07/30/03)
  Tables 1 and 2 submitted by: Wuyi Wang (wuyi.wang@gia.edu)
  Table 3 submitted by: Robert E. Kane (finegemsintl@msn.com)
  
  Supplementary Bibliography on Corundum Diffusion (07/30/03)
  Prepared by Gems & Gemology staff

• Source: B. A. Kjarsgaard and A. A. Levinson, "Diamonds in Canada," Summer 2002, pp. 208-238.
  Discredited, Unsubstantiated, and Doubtful Reports of Diamond Discoveries in Canada Before 1963 (10/30/02)
  Submitted by: B. A. Kjarsgaard and A. A. Levinson (levinson@geo.ucalgary.ca)

• Source: Dona Dirlam et al., "Liddicoatite-Elbaite Tourmaline from Anjanabonoina, Madagascar," Spring 2002, pp. 28-53.
  Electron-Microprobe Analyses of Liddicoatite-Elbaite (05/17/02)
  Table 1: Samples from Madagascar.
  Table 2: Samples from Localities Other Than Madagascar.
  Submitted by: B. Laurs (blaurs@gia.edu)
  Notes: These tables provide all of the chemical data on liddicoatite-elbaite tourmaline that were obtained for this article. The references cited in the table are listed in the reference list of the original article.

• Source: James E. Shigley et al., "Gem Localities of the 1990s," Winter 2000, pp. 292-335.
  Pearl Localities Table - Expanded Version (01/29/01)
  Submitted by: D. Dirlam (ddirlam@gia.edu)