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Gemworld International are laying on three important corundum classes in the UK in May 2012. The pricing of ruby and sapphire, their treatments and importantly, the assessment of these factors, are crucial knowledge for the Professional Jewellery Valuer and Gemmologist. Below is an outline of the course, the venues (Perth, Birmingham and London), the instructors and the costings. “Corundum Treatments and Pricing”, has been designed by Gemworld International, Inc., the publisher of The Guide and a leading provider of price trend and market information for the international gemstone trade. The scientific adviser for this programme is Christopher Smith, President of the American Gemological Laboratories.

The Course – “Corundum Treatments and Pricing”

The sale of treated corundum has dramatically increased the supply of products sold as ruby and sapphire. Accurately pricing corundum requires the professional gemmologist to distinguish not only between treated and natural, but also between the various treatments encountered in today’s global market. This programme will practically show you how to reconcile the pricing of rubies and sapphires by specific treatment type. The course is very hands-on, so to ensure all participants receive the required attention, the places available are strictly limited to ten people. The workshop has been modified to suit the UK’s preference for the use of the loupe, although microscopes will also be available. Participants will examine a variety of natural and treated ruby and sapphire, over 100 specimens will be available for examination and discussion. The hands-on session is supported by a PowerPoint presentation featuring high quality images of certain characteristics that reveal if and how the stones have been enhanced. Naturally, pricing forms an important part of the course and as such, a presentation concerning pricing considerations is included.

The Instructors – Dr. Cigdem Lule and Stuart Robertson

Cigdem Lule PhD, GG, FGA, is the Special Projects Manager of Gemworld International Inc., Illinois, USA. She is currently directing the development and implementation of a series of research and training strategies for the company. In addition to her PhD in mineralogy, Dr. Lule also earned her FGA and DGA in 1998 and her GG in 2005. Dr. Lule established the Gem Laboratory of Ankara University and has trained graduates and undergraduates in gemmological research. She was a gemmology instructor at GIA London from 2004 to 2010. She is a member of The Scottish Gemmological Association (SGA), Accredited Gemologists Association (AGA) and Mineralogical Society of America (MSA). Stuart Robertson, GG is the Research Director for Gemworld International, Inc., Illinois, USA. Gemworld International, Inc. He supervises the collection and interpretation of pricing data and related research conducted by the company’s research staff. He also authors reports and articles regarding market trends observed in areas including: exploration and mining, as well as issues related to treatment disclosure, identification and detection of treatments and their effect on pricing and value. Mr. Robertson is an Accredited Senior Gemologist, Accredited Gemologists Association (AGA), a member of the National Association of Jewelry Appraisers (NAJA), and The Scottish Gemmological Association (SGA). Mr. Robertson serves on the Board of Governors of the Accredited Gemologists Association, was Conference Co-Chair, World of Gems Conference, 2010 and was awarded the prestigious Antonio C. Bonanno Excellence in Gemology Award, 2011.

The Venues

Perth: 4th May. 10am – 5pm

The Algo Business Centre is conveniently located within walking distance of the Scottish Gemmological Association Conference that starts on the evening of the 4th. The course will take place in the Boardroom. Lunch, teas and coffees included.

Birmingham: 8th May. 10am – 5pm

Fellows, one of the UK’s leading auction houses, based in the heart of the Jewellery Quarter. The course will be conducted in Fellows’ dedicated training room. Lunch, teas and coffees included.

London: 11th May. 10am – 5pm

The Florida State University is in the West End, close to the British Museum. Lunch is included.

Cost and Booking

Each one-day course costs $450 USD Credit Cards accepted To book a place at one of these events please: Email Dr Cigdem Lule at or Telephone her on 001 847.657.0555 ext: 207 (number includes international dialling code from UK. Chicago is 6 hours behind the UK)



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