Color Communication and Quality Grading of Colored Gemstones: A Non-Technical Look at the Technology Behind Grading

Posted on May 1, 2007 by Richard B. Drucker, GG

Pigeon blood ruby. Cornflower blue sapphire. Flame red spinel. The names conjure up great images in the mind of what these gems look like, but do we really know what their color is? Are these…

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