GIADJ issues reports on all colored stones and precious & semi-precious gems as well. By having experienced gemologists using high tech testing techniques and advanced equipment GIADJ is able to offer accurate reports to customers.
Contact GIADJ for accurate grading and certification of coloured stones, diamonds, and gems.
Identification of Gemstone Treatments
Often times, gemstones are treated or altered in an attempt to appear higher quality than they really are. GIADJ understands this and includes enhancement, detection techniques as part of our testing. GIADJ delivers opinions on issues including heating treatments, surface diffusion of sapphires and other varieties of corundums, emerald oiling, glass fillings of rubies, jade coating and dying, and more.
“Choose GIADJ to make sure your diamond or other gemstone is the quality that you believe it to be”.