Vivianne Del Signore - Director, Marketing, Gemological Institute of America | Contact Information, Email Address, Phone Number, Budgets and Responsibilities

Gemological Institute of America, based in Carlsbad, CA., is a non-profit institute committed to the research and education in the gemology field. The institute developed a methodology called the 4 C's ( Cut, Clarity, Color, Clarity) as a grading system for diamonds and is one of the largest and most respected institutes for gemological research and learning.