File list
This special page shows all uploaded files.
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Date | Name | Thumbnail | Size | Description | Versions |
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04:53, 6 December 2008 | Scenic jasper.jpg (file) | 91 KB | Scenic jasper. Image courtesy of topsieraden.nl | 1 | |
08:06, 8 August 2008 | PinkTourmalineOval5 32ct.jpg (file) | 46 KB | 2 | ||
07:24, 8 August 2008 | RedTourmalineOval5 32v02.jpg (file) | 34 KB | 2 | ||
07:21, 8 August 2008 | RedTourmalineOval5 32ct.jpg (file) | 42 KB | Heat treated brown-red Nigerian tourmaline. Image courtesy of Roger Dery. | 1 | |
01:24, 21 May 2008 | Lapis Afghanistan.jpg (file) | 75 KB | Top quality untreated lapis lazuli cabochon from Afghanistan (50.60 Carats). Image courtesy of Scott Davies, americanthain.com | 1 | |
01:18, 21 May 2008 | Colorless forsterite.jpg (file) | 53 KB | Image courtesy of Scott Davies, Americanthai.com | 1 | |
11:19, 6 December 2007 | TaaffeiteGroup.gif (file) | 92 KB | 10 taaffeites. Photo courtesy of Brad Payne. | 1 | |
06:27, 2 December 2007 | Polarizer without polarizing direction.jpg (file) | 8 KB | A polarizing filter. By Doos | 1 | |
06:27, 2 December 2007 | Polarizer with polarizing direction.jpg (file) | 9 KB | A polarizing filter with the pass-through direction indicated. By Doos | 1 | |
06:26, 2 December 2007 | Wire-grid polarizer2.jpg (file) | 13 KB | A wire grid polarizer (east-west bars). By Doos | 1 | |
06:25, 2 December 2007 | Wire-grid polarizer.jpg (file) | 14 KB | A wire grid polarizer. By Doos | 1 | |
09:23, 7 November 2007 | Trapichesapphirepair2zo9.jpg (file) | 640 KB | A 100ct trapiche sapphire.<br /> By Chaman Golecha. | 1 | |
09:22, 7 November 2007 | Trapichesapphirepair1am4.jpg (file) | 516 KB | Trapiche sapphire.<br /> By Chaman Golecha. | 1 | |
05:06, 19 October 2007 | Adding arrows interference.jpg (file) | 10 KB | By Doos | 1 | |
05:06, 19 October 2007 | Adding arrows addition.jpg (file) | 11 KB | By Doos | 1 | |
06:32, 18 October 2007 | Adding arrows reflection diffraction.jpg (file) | 39 KB | 2 | ||
05:19, 18 October 2007 | Adding arrows reflection diagram.jpg (file) | 43 KB | Close up of reflection on different spots of a mirror with arrows.<br /> By Doos | 1 | |
07:41, 17 October 2007 | Adding arrows reflection.jpg (file) | 24 KB | 2 | ||
11:23, 29 September 2007 | Diamond dot structure.png (file) | 10 KB | By Doos | 1 | |
05:16, 28 September 2007 | Immersion reflection.png (file) | 39 KB | Refraction in a mineral and the lack therof when immersed in a liquid of equal index of refraction. By Doos | 1 | |
06:22, 26 September 2007 | Anderson method2.jpg (file) | 19 KB | Illustration of the immersion method by B.W. Anderson for comparetive index of refraction. By Doos | 1 | |
08:39, 25 September 2007 | Plato immersion.png (file) | 12 KB | Illustration of the "becke lines" in the Plato immersion technique. By Doos. | 1 | |
09:27, 24 September 2007 | Anderson rims.png (file) | 18 KB | Illustration to show the different shadows casted by a brilliant cut gemstone. By Doos | 1 | |
07:29, 24 September 2007 | Anderson method lens.png (file) | 12 KB | Illustration of light bending through a lens (after Dr. W.Wm. Hanneman). By Doos. | 1 | |
05:16, 24 September 2007 | Anderson method.jpg (file) | 17 KB | Illustration of the immersion method by B.W. Anderson for comparetive index of refraction. By Doos | 1 | |
12:44, 20 September 2007 | Verneuil.png (file) | 21 KB | 3 | ||
12:41, 15 September 2007 | Sideritemm2.jpg (file) | 58 KB | A rare faceted siderite. Notice the strong doubling of facet edges easily visible. By Chaman Golecha, Gem Testing Laboratory, Jaipur | 1 | |
05:14, 12 September 2007 | Ekaniteed8.jpg (file) | 41 KB | A green radioactive ekanite. By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
08:57, 7 September 2007 | Cubic Zirconia Run Opening.jpg (file) | 1.93 MB | Picture by Larry P kelley Shows a cubic zirconia 'run' after being removed from a skull crucible and broken open. (Taken from public domain) | 1 | |
08:01, 7 September 2007 | Skull-melting2.jpg (file) | 38 KB | Skull-crucible method to create synth. cubic zirconia By Doos | 1 | |
07:19, 4 September 2007 | IMG 0871.JPG (file) | 874 KB | Courtesy of Dave Gibson http://www.geocities.com/davegibson46/ | 1 | |
07:18, 4 September 2007 | IMG 0839.JPG (file) | 470 KB | Courtesy of Dave Gibson http://www.geocities.com/davegibson46/ | 1 | |
06:04, 4 September 2007 | Gemtrade.jpg (file) | 6 KB | secrets of the gem trade image for monthly book | 1 | |
08:43, 1 September 2007 | Sublimation1.png (file) | 29 KB | By Doos, adapted from US patent 34861 | 1 | |
07:49, 30 August 2007 | Diasporeccwz3.jpg (file) | 71 KB | Diaspore (colour-changing from green in daylight to brown in incandescent light - also known as “Zultanite” in the gem market). By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
03:40, 30 August 2007 | Mandarine garnet hf.jpg (file) | 263 KB | Inclusions in a mandarine garnet. By John Huff, gemcollections.com | 1 | |
04:25, 29 August 2007 | Axinitesm2.jpg (file) | 41 KB | A pinkish/greenish brown axinite. By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
10:42, 27 August 2007 | Sillimanitefibrousdyessf1.jpg (file) | 59 KB | A fibrous sillimanite dyed red simulating a ruby. Such sillimanites are dyed in different colours to simulate various stones like ruby, sapphire, emerald and others. By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
10:41, 27 August 2007 | Sillimanite2hy8.jpg (file) | 57 KB | A brown sillimanite. By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
09:20, 27 August 2007 | Danburiteyq8.jpg (file) | 63 KB | A colorless danburite. By Chaman Golecha, Gem Testing Laboratory, Jaipur | 1 | |
11:19, 26 August 2007 | Trapiche emeraldme9.jpg (file) | 70 KB | A magnificent trapiche emeralds encountered at the Gem Testing Laboratory, Jaipur which formed a suite with 3 others weighing 40.65 ct in total and said to be cut from a single rough crystal - has been reported in "Gems and Jewellery" (December 2006). By | 1 | |
06:23, 25 August 2007 | Clinohumite diffraction spectrum.jpg (file) | 11 KB | By Doos. | 1 | |
05:59, 25 August 2007 | Clinohumiteyv8.jpg (file) | 129 KB | A 9.45 ct brownish orange clinohumite tested at Gem Testing Laboratory. Courtesy of Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
10:41, 24 August 2007 | Spectrum natural blue spinel iron.jpg (file) | 14 KB | Spectrum of blue natural spinel (colored by iron). By Doos | 1 | |
10:38, 23 August 2007 | Spodumeneyellowom7.jpg (file) | 29 KB | Faceted yellow spodumene. By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
10:38, 23 August 2007 | Spodumenegreenvt6.jpg (file) | 23 KB | Faceted green spodumene. By Chaman Golecha, Gem Testing Laboratory, Jaipur. | 1 | |
03:50, 23 August 2007 | Phenakitetv6.jpg (file) | 26 KB | A facetted colourless gem quality phenakite. By Chaman Golecha, Gem Testing Laboratory, Jaipur | 1 | |
03:06, 18 August 2007 | Syntehticforsteriteha1.jpg (file) | 57 KB | Synthetic forsterite By Chaman Golecha Gem Testing Laboratory, Jaipur | 1 | |
12:23, 15 August 2007 | Topazcatseyest4.jpg (file) | 28 KB | By Chaman Golecha | 1 | |
12:22, 15 August 2007 | Topazparticolouredek7.jpg (file) | 47 KB | By Chaman Golecha | 1 |
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