Collectors Universe Diamond Certification Unit Is Approved by Christies for Diamond Auctions

. August 28, 2007

Collectors Universe, Inc. , a leading provider of value-added authentication and grading services to dealers and collectors of high-value collectibles, diamonds and colored gemstones, today announced that its diamond authentication and grading division, Gem Certification & Assurance Lab (GCAL), has been approved by Christie’s auction house to provide diamond certification services for diamonds consigned to Christie’s for sale. Christie’s catalogs will include references to the GCAL Diamond Certificate in the description of the item.

“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.”

As a result of the decision by Christie’s, for diamonds under 2.0 carats submitted for auction with a GCAL grading certificate, other than those with D color and flawless clarity, Christies will list the GCAL certificate in its auction catalog. In the case of D color diamonds with flawless clarity, a Gemological Institute of America (GIA)(R) certificate would also be required. For diamonds 2.0 carats or larger which are submitted to Christie’s for auction with grading certificates from both GCAL and GIA, Christie’s will list GCAL’s certificate, as well as GIA’s, in its auction catalog. Only GCAL certificates and GIA reports are currently approved for inclusion in Christie’s catalogs.

“We are delighted to provide our diamond authentication and grading services to Christie’s jewelry experts, auctioneers and marketers worldwide,” said Michael R. Haynes, Chief Executive Officer. “As a renowned auction house leader, Christie’s acceptance of our GCAL certification underscores the value of our brand for their consignors, and ultimately, Christie’s auction bidders and buyers. This is an important step in building our brand through world class channels, and it’s a strategy that we will continue to execute as we expand our presence in this marketplace.”

About Collectors Universe

Collectors Universe, Inc. is a leading provider of value added services to the high-value collectibles and diamond and colored gemstones markets. The Company authenticates and grades collectible coins, sports cards, autographs, stamps, currency, diamonds and colored gemstones. The Company also compiles and publishes authoritative information about United States and world coins, collectible sports cards and sports memorabilia, collectible stamps, diamonds and colored gemstones. This information is accessible to collectors and dealers at the Company’s web site,, and is also published in print.

Gem Certification and Assurance Lab (GCAL) is a diamond research and identification laboratory specializing in guaranteed diamond grading.

Category: Auction News

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