GIA is the largest and most respected non-profit institution engaged in gem research in the world. 193 1 year, Robert shipley established the GIA Gemological Institute in Los Angeles, California. Today, the college is headquartered in Carlsbad, north of San Diego, California. In addition, there is a branch school in new york, USA. GIA is the founder of promoting the internationalization of diamond certification. GIA is a non-profit organization, and its funds are donated by people in the jewelry industry. Its main service scope is the education and research of jewelry design and professional knowledge, which is deeply recognized by the global jewelry industry. There are also some branches in other countries and regions in the world. /Abu/school . htm http://www.gia.edu/