Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...
A rubric is a scoring tool that explicitly describes the instructor’s performance expectations for an assignment or piece of work. A rubric identifies: criteria: the aspects of performance (e.g., ...
Feature Gems & Gemology, Summer 2002, Vol. 38, No. 2 Characterization and Grading of Natural-Color Pink Diamonds John M. King, James E. Shigley, Scott S. Guhin, Thomas H. Gelb, and Matthew Hall ...
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