Central Reference Laboratory
16133 Ventura Boulevard Suite 360,Encino,CA 91436
tel: (818) 990-6451
Central Reference Laboratory
16133 Ventura Boulevard Suite 360,Encino,CA 91436
tel: (818) 385-0698
Gemological Institute Laboratory
550 South Hill Street,Los Angeles,CA 90013
tel: (213) 629-4404
Perizo Laboratory
5015 West Washington Boulevard,Los Angeles,CA 90016
tel: (323) 954-9185