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41. 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
42. 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
43. 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
44. 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
45. 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
46. 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
47. Burma’s Jade Mines • Tracing the Green Line • Lotus Gemology: (Articles); ... the skin by pinching it with a coin. The Maw-sisa miner at left is prepared for any kind of flying pest, as was Richard Hughes after he had the treatment applied. The efficacy of this bug protection was ...; Created on 14 April 2014
48. Pigeon's Blood • Pilgrimage to Mogok – Valley of Rubie: (Articles); ... of their clarity and color to heat treatment, this statement does not seem so outlandish (unfortunately, most Burmese rubies are today also heat treated). For the love of a brother Brotherly ...; Created on 12 April 2014
49. Gem Testing with the Spectroscope • Lotus Gemology: (Articles); ... not undergone high-temperature heat treatment. A complete identification was possible in this case with just two instruments. An added bonus in this instance was that no refractometer was needed, which ...; Created on 09 March 2014
50. Photoatlas of Inclusions in Gemstones, Volume 2 • Book Review • Lotus Gemology: (Book Reviews); ... The effects of heat treatment on zoisite (tanzanite). Page 809. Eye candy But I doth protest too much. The Photoatlas series ...; Created on 07 March 2014

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