I have a pair of diamond stud earrings, I have a certification but it is from GCI-labs which certifies diamonds from Israel, Russia, India, Japan and Thaliand. I want to sell these pair of earrings to a jewler and I heard that GIA does not certify mounted diamonds. Would I be able to sell these diamond earrings with that certificate GCI-labs in the U.S and if not does anyone no where I can get them certified?