File list

Jump to: navigation, search

This special page shows all uploaded files.

File list
 
First page
Previous page
Last page
Date Name Thumbnail Size Description Versions
12:33, 4 September 2012 Wanna fanta diagram.jpg (file) 280 KB   1
14:49, 26 March 2012 GOlogo.jpg (file) 48 KB   1
01:39, 19 March 2012 TOC.jpg (file) 307 KB Image pointing out the TOC 1
01:21, 19 March 2012 GPlogonoback.png (file) 5 KB Logo without white background 1
08:42, 14 April 2010 Sodthumb2.jpg (file) 58 KB   1
08:32, 14 April 2010 Star of david 43-45-47.gem (file) 11 KB Star of Dvid design 1
08:31, 14 April 2010 Sod.jpg (file) 142 KB Star of David design 1
00:52, 10 March 2010 Blueflashglassfilledruby.jpg (file) 107 KB Blue flashes in a glass filled ruby, diagnostic for lead-glass filing. <br /> © Tim Spauwen 1
08:16, 9 March 2010 Spess2.JPG (file) 43 KB Crystal inclusions in a Tanzanian spessartite. <br /> © Tim Spauwen, FGA 1
08:12, 9 March 2010 Spess3.JPG (file) 54 KB Double refractive crystal inclusion in a Loliondo spessartite. <br /> © Tim Spauwen, FGA 1
08:04, 9 March 2010 Loliondospess.jpg (file) 191 KB Typical spessartite spectrum due to manganese, an essential component to spessartite which makes spessartite idiochromatic. Spectrum courtesy of Brian Thompson, edited by Tim Spauwen. 1
07:26, 29 January 2010 Ribbonthumb.jpg (file) 101 KB Thumbnail of 'the Ribbon' by Charles R McCoy. 1
07:14, 29 January 2010 Ribbon2.jpg (file) 155 KB The Ribbon by Charles R McCoy 1
07:05, 29 January 2010 Ribbon.jpg (file) 139 KB 'The Ribbon' by Charles R McCoy 1
07:04, 29 January 2010 Ribbon.gem (file) 12 KB 'The Ribbon' by Charles R McCoy 1
10:42, 25 January 2010 GPFDC.jpg (file) 134 KB   1
05:59, 25 January 2010 Design contestleft.png (file) 77 KB   1
05:58, 25 January 2010 Design contest right.png (file) 104 KB   1
03:27, 28 November 2009 Easy Bar.jpg (file) 27 KB Easy Bar by Hideki Ikeda 1
03:26, 28 November 2009 Acorn.jpg (file) 104 KB Acorn by Hideki Ikeda 1
09:34, 1 November 2009 SEM.JPG (file) 24 KB SEM <br /> Photo courtesy: WikiMedia Commons <br /> <br /> The SEMs technique, with additional attachments, can obtain elemental analysis. Polished specimens give a better result, since in rough specimens the variations are due to surface rather than th 1
09:30, 1 November 2009 LA-ICP-MS.JPG (file) 21 KB LA-ICP-MS <br /> (Left side of photograph: ICP-MS, Right side of photograph: LA) <br /> Photo courtesy: Gübelin Gemmological Laboratory, Ltd <br /> <br /> The MS identifies and quantifies elements in terms of mass and charge and can detect 65 eleme 1
09:22, 1 November 2009 LIBS.JPG (file) 17 KB LIBS Photo courtesy: Michael Stubelt and New Wave Research Company <br /> <br /> The technique, LIBS, also known as also known as Laser Spark Spectroscopy (LASS) or Laser-Induced Plasma Spectroscopy (LIPS), is used especially for: *The analyses of major, 1
09:15, 1 November 2009 ED-XRF.JPG (file) 20 KB ED-XRF Photo Courtesy of Dr. Michael S. Krzemnicki, Director, Swiss Gemmological Institute © Swiss Gemmological Institute SSEF <br /> The ED-XRF, a non-destructive spectroscopic technique, uses an x-ray beam that illuminates the gemstone sample. This e 1
09:11, 1 November 2009 FTIR.JPG (file) 14 KB FT-IR spectrometer Photo courtesy: Gübelin Gemmological Laboratory, Ltd. <br /> Infrared spectroscopy measures absorptions of a gem material, due to vibrations in the crystal structure, in the infrared region of the electromagnetic spectrum. The FT-I 1
09:07, 1 November 2009 Ramanscope.JPG (file) 21 KB Raman Photo courtesy: Gübelin Gemmological Laboratory, Ltd. This is a light-scattering and non-destructive technique which allows for the identification of inclusions in a gemstone by comparing a gemstone’s spectrum to a mineral database for identifi 1
08:58, 1 November 2009 UV-ViS-NIR.JPG (file) 22 KB UV-ViS-NIR spectrometer Photo courtesy: Gübelin Gemmological Laboratory, Ltd. <br /> This instrument analyzes a full range of spectrum, from the ultra-violet to near infrared. A gemstone absorbs light at a different range depending on its natural or tr 1
08:41, 1 November 2009 Gemolite.JPG (file) 26 KB Gemological Stereo Microscope Photo courtesy: Gübelin Gemmological Laboratory, Ltd. The gemological microscope is an invaluable tool in the laboratory. By using illumination techniques, the internal characteristics of a gemstone can be examined with th 1
08:00, 1 November 2009 Tsav.JPG (file) 23 KB Collection samples of gem-quality tsavorite from the Scorpion Mine Photo courtesy: Vincent Pardieu 1
07:58, 1 November 2009 Tsavsorting.JPG (file) 39 KB Research Field Gemologist, Vincent Pardieu, studies tsavorite rough at a sorting station, alongside tsavorite miners and Campbell Bridges. Photo courtesy: Vincent Pardieu 1
07:56, 1 November 2009 Tsavpotato.JPG (file) 26 KB Tsavorite (tsavolite) porphyroblast or “potato with tsavorite eyes” Photo courtesy: Vincent Pardieu 1
07:48, 1 November 2009 VPKenia1.JPG (file) 24 KB On a 2005 expedition in Tsavo, Kenya, Research Field Gemologist, Vincent Pardieu, visits the late Campbell Bridges, discoverer of the vanadium-bearing and beautiful green grossular garnet, tsavorite, at the Scorpion Mine, Pit #2, for gemological research 1
07:05, 1 November 2009 Gubelin.bmp (file) 26 KB The father of origin determination, Dr. Eduard (Edward) J. Gübelin, (1913-2005), admires a set of gems from his personal collection, which contained more than 5,000 gemstones. Photo copyright of the Eduard J. Gübelin Family 1
09:55, 28 September 2009 Fac9.jpg (file) 8 KB   1
09:54, 28 September 2009 Fa5.jpg (file) 9 KB   1
09:49, 28 September 2009 Fac7.jpg (file) 4 KB   1
09:48, 28 September 2009 Fa4.jpg (file) 5 KB   1
09:46, 28 September 2009 Fac6.jpg (file) 4 KB   1
09:45, 28 September 2009 Fac4.jpg (file) 4 KB   1
09:43, 28 September 2009 Fac3.jpg (file) 4 KB   1
09:37, 28 September 2009 Fa2.jpg (file) 4 KB   1
08:59, 28 September 2009 Fac1.jpg (file) 5 KB   1
08:51, 28 September 2009 Faceting head.jpg (file) 9 KB   1
08:48, 28 September 2009 SRB800px2.JPG (file) 84 KB   1
07:55, 28 September 2009 SRB.gem (file) 11 KB   1
10:23, 23 September 2009 Mitch6.jpg (file) 165 KB   1
10:22, 23 September 2009 Mitch5.jpg (file) 171 KB Image courtesy of mhuynh 1
10:21, 23 September 2009 Mitch4.jpg (file) 179 KB Image courtesy of mhuynh 1
10:20, 23 September 2009 Mitch3.jpg (file) 168 KB Image courtesy of mhuynh 1
10:20, 23 September 2009 Mitch2.jpg (file) 155 KB Image courtesy of mhuynh 1
First page
Previous page
Last page