Established in 1931, GIA is the world’s foremost grading and certification authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry. In 1953, the GIA developed its International Diamond Grading System and the Four Cs (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. The key to GIA– they don't buy, sell, trade or cut diamonds – they don't value (how much is my diamond worth?) so there is no conflict of interest, ulterior motives for higher or lower grading. Multiple diamond gemologists score each diamond and must agree. This avoids "pay offs", dishonest deals for exaggerated color or clarity grading. Their integrity over the years has earned them the ‘Gold Standard’ reputation worldwide.
The GIA Laboratory provides a variety of gem grading and identification reports. Diamond grading reports for unmounted natural diamonds determine their key characteristics: color, clarity, cut and carat weight. GIA issues a complete Diamond Grading Report. The reports contain a number of measurements, unique to the individual diamond being evaluated, including length (millimeters), width (millimeters), and depth (millimeters), as well as a diagram of where and what types of inclusions (flaws) are located in or on the diamond. Diamond grading reports are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 milligrams), and almost always for over 1.0 carat (200 milligrams), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer. Gray & Sons goes an extra step and pays GIA to engrave the certificate number on the diamond after grading – to offer our customers peace of mind to know – the “Pedigree” delivered with their diamond is really for THAT diamond.
At Gray & Sons, we offer a wide selection of GIA-certified diamond rings, bracelets, necklaces, pendants, and loose diamonds. Large diamond jewelry from our inventory comes with a GIA certificate. We have two in-house GIA-Certified Diamond Gemologists and Colored Stones Specialists.Sell or Consign Your Diamonds