Update: The Impact of Choice of Illumination in the Wholesale Buying, Selling, and Grading of Gemstones

During the GIA Symposium on May 29 - 30, 2011 Manfred Eickhorst spoke on The Impact of Illumination in the Buying, Selling, and Grading of Gemstones.

See more Details here:

http://www.gia.edu/symposium/index.cfm?content=research

UPDATE: An article on this topic was published in Gems & Gemology, Volume 47, Issue 2, Summer 2011. View article