Pink Diamond Identification Process May Lead to Real Pink Diamonds
2005: Pink Diamond Identification Process In View of Smith
How Do You Know When Pink Is Really Natural Pink? - Oct.2005
Christopher Smith, director of Identification Services at GIA, gave a presentation on the identification of treated-color pink-to-red diamonds at a recent conference organized by the Accredited Gemologists Association (AGA).
Smith explained the distinguishing characteristics of HPHT-treated diamonds produced by Lucent Diamonds. The characteristics are:
· Chalky fluorescence is exhibited to long-wave UV, usually in combinations of yellow, green, and orange. Under short-wave UV, they showed medium to strong orange fluorescence, commonly with weak yellow zones. Prominent green visible luminescence was typical. Orange-red and yellow visible luminescence was also detected.v