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21. Pressure Heated Sapphire • Squeezing Sapphire • Corundums treated with high temperatures and low pressure (HT+P): (Articles); ... at the question of whether a separate disclosure is needed for the treatment. The following organizations have contributed to and endorse the contents of this article: CGL Central Gem Lab, Japan; CISGEM, ...; Created on 20 February 2019
22. Laos Sapphires • Laos – Land of a Million Elephants... & Sapphires: (Articles); ... size of the gems recovered, the promise was never fully realized. Little serious mining occurred until the 1960s. Like many another sapphire mine, modern heat treatments make salable what was once too ...; Created on 18 February 2019
23. Sapphire With Growth Tube Cluster • Sapphire Inclusions: (Articles); Surface-reaching growth tubes in a sapphire provide insight into the gem’s origin and treatment history. Surface-reaching growth tubes within a sapphire exhibit unaltered yellowish staining, an indication ...; Created on 23 February 2018
24. Oiled Ruby: A Remarkable Visual • Ruby Inclusions: (Articles); ... it is sold under the brand name “King Ruby Red Oil”). Often this treatment can be identified by flattened gas bubbles in the fissures or by droplets of oil seeping out of the fissures on the surface when ...; Created on 23 February 2018
25. Lecture • Madagascar: Sapphire Isle • Tucson • 31 January 2018: (News); ... on the heat treatment of Madagascar sapphire. When 31 January 2018 Where 2018 Accredited Gemologists Association Tucson Conference Tucson University Park Hotel Conference Center 880 E. Second Street ...; Created on 31 January 2018
26. Lecture • Ruby Inclusions • Sweden • 17 June 2017: (News); A description of the inclusions found in ruby around the world, including Myanmar, Thailand/Cambodia, Vietnam, Tajikistan, Madagascar and Mozambique. Dream of the Red Chamber: The Internal World of ...; Created on 17 June 2017
27. Gem Inclusion Pairs • Hyperion Siamese Twins: (Articles); ... fissures between the individual crystal grains that make up the jade rock. These fissures are then filled with a polymer. Thus the treatment removes brown discoloration and greatly improves the translucency. ...; Created on 29 January 2016
28. Inclusions in Gemstones • Hyperion Literature Sources: (Articles); ... R. and Nassau, K. (1981) The heat and diffusion treatment of natural and synthetic sapphires. Journal of Gemmology, Vol. 17, No. 8, Oct., pp. 528–541; RWHL*. Du Toit, G., Hughes, R.W. et al. (2006) Beryllium-treated ...; Created on 22 January 2016
29. Ruby From Madagascar • Let It Bleed • Lotus Gemology: (Articles); ... indication of artificial heat treatment, was absent. This, along with the inclusions, suggested that all the stones submitted had not been subjected to heat treatment. Some specimens showed a large IR ...; Created on 28 August 2015
30. Gem Enhancements Explained • Lotus Gemology: (Lab); ... treatments which are detected. Our approach is to give our customers the same information we would want when purchasing a gem. The following tables explain the enhancement terminology as given on Lotus ...; Created on 14 May 2015
31. GemmoRaman-532 • Instrument Review • Lotus Gemology: (Articles); ... than ever. With treatments become increasingly sophisticated, gemologists and traders search for new tools to help identify stones. How does one make the call on a completely clean spinel, with no ...; Created on 20 March 2015
32. Oiled Gems Lab Alert • Lotus Gemology: (Articles); ... decide what is and is not acceptable in terms of treatments. Certainly there is a place in the market for natural, treated, synthetic and imitation stones. That said, we have had a string of clients who, ...; Created on 09 March 2015
33. Lecture • Ruby Inclusions • Hong Kong • 18 September 2014: (News); ... the world are revealed. Also discussed are ruby treatments and how to identify them. When 18 September 2014; 10:00–11:00 AM Where Gübelin Gem Lab Conference Hong Kong Gem and Jewellery Show Room ...; Created on 18 September 2014
34. Lotus Gemology Price List: (Articles); Lotus Gemology produces what we feel are the finest gem testing reports in the gemological field. Each report includes gemstone identification, treatment identification and, in certain cases (mainly ruby, ...; Created on 04 July 2014
35. Testing Yellow Sapphire • Passport to Obscurity: (Articles); ... piece of jewelry. In gems of this type, inclusions are often sufficient to immediately identify the host as a natural sapphire, as well as prove or disprove heat treatment. When present, a 3160 infrared ...; Created on 31 May 2014
36. Ruby, Pink Sapphire & Padparadscha • Walking the Line: (Articles); ... when compared with treated stones of similar quality. A fraudulent treatment sometimes seen is where a pink sapphire is irradiated to give it a padparadscha color. The resulting color is unstable and ...; Created on 01 May 2014
37. FTIR in Gem Testing • FTIR Intrigue • Lotus Gemology: (Articles); ... Such treatment is typically unmasked by reference to FTIR spectra. When we first checked the FTIR spectrum via the DRIFTS method, large polymer peaks were found. A recheck with the beam condenser method ...; Created on 25 April 2014
38. Lenny Cram's Opal Mine • Fun Down Under • Lotus Gemolog: (Articles); ... industry. So they should begin to behave like it. When a company develops an industry-crippling treatment such as the Pegasus (HPHT) diamond, that company has a responsibility to assist in its identification ...; Created on 20 April 2014
39. Beryllium Diffusion in Orange Sapphire • The Skin Game: (Articles); ... Skin Game March 2002 – In October 2001, Australian gemologist Terry Coldham informed the author of a new treatment for orange sapphire. His initial report was that a burner in Chanthaburi, Thailand had ...; Created on 19 April 2014
40. Jade in Upper Burma • Heaven and Hell • Lotus Gemology: (Articles); ... treatment applied. The efficacy of this bug protection was made crystal clear in Mogaung, where Hughes and French gem dealer, Olivier Galibert slept side-by-side in the same bed. Come morning, Galibert' ...; Created on 17 April 2014

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