美国宝石学院——GIA

　　meiguobaoshixueyuan gemological institute of america dechuangbanrenrobert m. shipleyyu1931nianzaimeiguolos angeleschengligia，zuichushiyongyexiaojihanshoufangshixunlianzhubaoshangruhepinggupifajia，1953niangiazainew yorkchuanglilediyisuoshiyanshi laboratory，kaishiqianfazuanshijiandingbaogaoshu，erhouyouzaijiazhoushengtamengnika santa monica jilashiqushelilingliangge laboratory，zhengshimingchengweibaoshiyejiandinggongsi gem trade laboratory .inc (gtl)，gtllishuyugiazhuanzhijiandingbugujia。

　　giashifeiyinglishiyedezuzhi，youmeiguogezhimingdezhubaoshangjishehuimingliugongtongzhichiersheli，shimeiguozhubaoyezhesuogongyougongxiangdejiandingyanjiujigou，qifushugtlzeweitigongjiandingfuwu。