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Date Name Thumbnail Size Description Versions
09:53, 3 May 2009 Tourmalien.jpg (file) 15 KB   1
10:29, 3 May 2009 Koppie2.JPG (file) 4 KB   1
09:31, 3 June 2009 Visual optics.png (file) 35 KB Old woodcut from Dieulafait 1874 ("Diamonds and precious stones") of a man doing “Visual Optics”. 1
04:06, 8 June 2009 Tim.jpg (file) 87 KB   1
06:44, 10 September 2009 Hauynelw.JPG (file) 30 KB Hauyne under LWUV 1
06:45, 10 September 2009 Africa.JPG (file) 24 KB Partially healed fracture in a Hauyne 1
06:47, 10 September 2009 Hauynecut.JPG (file) 11 KB Cut Hauyne, 0.26ct 1
07:01, 10 September 2009 Hauyneqy2.jpg (file) 11 KB visible spectrum of a well saturated blue hauyne Spectrum courtesy of dr Brian Thompson 1
12:28, 22 September 2009 My Morning Field.jpg (file)
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142 KB design by Jeffrey Hunt 1
12:29, 22 September 2009 My Morning Field 2.gem (file) 14 KB   1
02:55, 23 September 2009 Designhelp.jpg (file) 126 KB   1
03:10, 23 September 2009 Test2.jpg (file) 189 KB   1
03:51, 23 September 2009 Designhelp3.jpg (file) 143 KB   1
04:00, 23 September 2009 Designhelp4.jpg (file) 140 KB   1
04:55, 23 September 2009 Designhelp5.jpg (file) 149 KB   1
11:19, 23 September 2009 Mitch1.jpg (file) 161 KB Image courtesy of mhuynh 1
11:20, 23 September 2009 Mitch2.jpg (file) 155 KB Image courtesy of mhuynh 1
11:20, 23 September 2009 Mitch3.jpg (file) 168 KB Image courtesy of mhuynh 1
11:21, 23 September 2009 Mitch4.jpg (file) 179 KB Image courtesy of mhuynh 1
11:22, 23 September 2009 Mitch5.jpg (file) 171 KB Image courtesy of mhuynh 1
11:23, 23 September 2009 Mitch6.jpg (file) 165 KB   1
08:55, 28 September 2009 SRB.gem (file) 11 KB   1
09:48, 28 September 2009 SRB800px2.JPG (file) 84 KB   1
09:51, 28 September 2009 Faceting head.jpg (file) 9 KB   1
09:59, 28 September 2009 Fac1.jpg (file) 5 KB   1
10:37, 28 September 2009 Fa2.jpg (file) 4 KB   1
10:43, 28 September 2009 Fac3.jpg (file) 4 KB   1
10:45, 28 September 2009 Fac4.jpg (file) 4 KB   1
10:46, 28 September 2009 Fac6.jpg (file) 4 KB   1
10:48, 28 September 2009 Fa4.jpg (file) 5 KB   1
10:49, 28 September 2009 Fac7.jpg (file) 4 KB   1
10:54, 28 September 2009 Fa5.jpg (file) 9 KB   1
10:55, 28 September 2009 Fac9.jpg (file) 8 KB   1
08:05, 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
08:48, 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
08:56, 1 November 2009 Tsavpotato.JPG (file) 26 KB Tsavorite (tsavolite) porphyroblast or “potato with tsavorite eyes” Photo courtesy: Vincent Pardieu 1
08:58, 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
09:00, 1 November 2009 Tsav.JPG (file) 23 KB Collection samples of gem-quality tsavorite from the Scorpion Mine Photo courtesy: Vincent Pardieu 1
09:41, 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
09:58, 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
10:07, 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
10:11, 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
10:15, 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
10:22, 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
10:30, 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
10:34, 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
04:26, 28 November 2009 Acorn.jpg (file) 104 KB Acorn by Hideki Ikeda 1
04:27, 28 November 2009 Easy Bar.jpg (file) 27 KB Easy Bar by Hideki Ikeda 1
06:58, 25 January 2010 Design contest right.png (file) 104 KB   1
06:59, 25 January 2010 Design contestleft.png (file) 77 KB   1
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