GCAL approved by Christie's auction house to certify diamonds

"...Some diamond dealers worldwide use a new Gem Certification & Assurance certificate (GCAL) when trading gems," said Francois Curiel, International Director and Chairman, Christie's Europe. "The GCAL certificate is highly informative with regard to the 4 C's of diamonds -- clarity, color, cut and carat weight -- but GCAL also grades the optical symmetry plus brilliance of a stone and illustrates the diamond Gemprint with its reflective pattern. As the market leader, we believe it is important for Christie's to introduce these reports to the auction world..."

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Courtesy - cnn.com