HPHT Price List

In 2002, Universal Gemological Services (UGS), an appraisal affiliate of EGL USA laboratory, created the first industry wholesale price list for High Pressure High Temperature treated diamonds. The price list was launched in the May issue of Professional Jeweler.  It is updated and appears there every other month.

The initial HPHT price list was based on a year-long market study involving research from producers, wholesalers and industry consultants.

EGL USA has been deeply involved in HPHT research since 1999. As colorless and colored diamonds modified by HPHT have proven to be stable to normal wear and heat, the lab began grading these permanent colored stones in January 2000.  It was the first lab to design a grading report especially for colored HPHT diamonds and the process is briefly explained on the back cover of its newly designed Gem Report.

For more information on UGS's HPHT Price List, contact David Bidwell at 212-730-7380 Ext. 215