GIA說目前提供0.20克拉(或更小)鑽石的合成鑽石與色彩處理檢驗。

最大0.20克拉，每顆鑽石12美元，適用於D到Z顏色以及彩鑽的鑽石，黑鑽石到0.50克拉。雖然GIA原則上可接受裸鑽及已鑲嵌的鑽石，但實驗室聲明已鑲嵌的石頭會難以檢查，有可能會將他們從戒檯上拆下。

在檢驗後，GIA會發出證明指出該顆石頭是合成鑽石或是天然鑽石，如果是天然鑽石，該鑽石顏色是否有經過處理或改良。

除此之外，GIA的也降低”小證”的鑑定費用，即0.29克拉鑽石(或更小)鑽石四C分級報告，證書報告包括了在鑽石的腰圍雷射刻上GIA證書號碼。

合成鑽石的鑑定在珠寶業中會成為話題是因為今年IGI安特衛普國際寶石學院有數百顆0.30到0.70克拉的人造鑽石當作天然鑽石送驗，業界懷疑已有一定數量的人造鑽石已經打出證書流入市場。

在此事件後，珠寶業的領導人指出，鑑別合成鑽石(特別是小鑽)是個問題，這些小件商品的鑑定成本過高。

鑽石公爵曰: 果不其然，在今年5月份IGI發布145顆人造鑽石企圖以天然鑽石發出證書的新聞曝光後，珠寶業一片譁然，大家擔心已久的合成鑽石終於達到可以魚目混珠的地步，所謂魔高一尺，道高一丈，且看鑽石鑑定中心如何跟合成鑽石實驗室鬥法，GIA對於此歪道也已降低鑽石驗證成本因應，也代表未來鑽石都要有一張鑽石證書當做護身符，沒事也保平安。

本文譯自 珠寶月刊 (原文如下)

www.happydiamond.com

www.bestweb.com.tw

Carlsbad, Calif.--To address market concerns that have arisen in the wake of the recent synthetics scandal, the Gemological Institute of America announced that it has added new and lower-cost services for identifying lab-grown diamonds.

The GIA said it is now offering an identification option for diamonds 0.20 carats and smaller to its Quality Assurance services that combines screening for synthetics with color-treatment detection. It is designed to randomly screen parcels of small diamonds.

It is $12 per stone and is used for D to Z diamonds and colored diamonds up to 0.20 carats, and black diamonds up to 0.50 carats. Though the GIA accepts both loose and mounted goods for this service, the lab notes that mounted stones are more difficult to examine and may have to be removed from their setting.

Following examination, the lab will issue a statement that the stones are synthetic or natural and, if natural, if they have been treated to improve or alter their color.

In addition, the GIA said it has reduced the cost of its Diamond Dossier grading reports--which assess the Four Cs--by 10 percent for stones 0.29 carats and smaller. The reports include a microscopic laser inscription of the report number on the diamond’s girdle.

To see all current pricing, visit GIA.edu.

The identification of synthetic diamonds has been a much-talked-about topic in the industry after hundreds of synthetic diamonds between 0.30 and 0.70 carats in size were submitted to the International Gemological Institute in Antwerp without proper disclosure. The stones had been treated in such a way as to pass for natural diamonds.

In the wake of the scandal, industry leaders noted that the identification of synthetic melee is particularly problematic, as the amount of testing that needs to be done is cost-prohibitive for these small goods.