info from Link hidden: Login to viewâ€¢ GIA - Gemological Institute of America (New York City and Los Angeles)
â€¢ EGL - European Gemological Laboratories (New York City, Los Angeles, Vancouver & Toronto)
â€¢ AGSL - American Gem Society Laboratory Services (AGS is a sister concern of GIA, Las Vegas)
â€¢ HRD - Diamond High Council (Antwerp, Belgium)
â€¢ Gubelin Labs in Lucerne, Switzerland; Does mostly R & D
â€¢ IGI - International Gemological Institute (Worldwide)
And several other local labs like AGA, GCAL, etc.
Link hidden: Login to view is an international fine jewelry manufacturing company with over 27 years of experience located in the heart of the largest wholesale jewelry district, Los Angeles, California. With over 5,000 designs, they have one of the largest selections of jewelry online. All purchases from Sun Jewelry come with a certificate of authenticity. They accept credit cards - Visa, MasterCard, and American Express. International orders may be paid via wire transfer only. They implement a 30-day, no-questions asked return policy.