This classic Harry Winston ring is set with an exceptional 5.56-carat emerald-cut diamond that bears all the hallmarks of the legendary Golconda diamonds. The rare stone is certified by the Gemological Institute of America (GIA) as being D color and Type IIa, meaning it lacks any trace of nitrogen. Nitrogen is the element that gives diamonds color, making this gem a full two shades whiter than the whitest D-color diamond. It is also one of only a handful of Type IIa diamonds that are also Internally Flawless, a distinction that enhances both its beauty and rarity. Set in platinum and accentuated with approximately 1.00 total carat of tapered white diamond baguettes, this ring is truly a treasure to behold. Known as the “Ultimate Diamond,” Golconda diamonds are the purest of all diamonds, possessing a level of clarity, purity and transparency unrivaled by any other stone. They are universally accepted as the finest diamonds in the world; the diamond in this ring shares all their best qualities. To find a stone of this quality weighing over a few carats is a rarity, but to find one weighing 5.56 carats — especially in a design by the great Harry Winston — is truly once in a lifetime. The House of Harry Winston is known for dramatic, unique designs incorporating the world's best gemstones. Founded in 1932, the jeweler continues to create spectacular designs for celebrities and discerning clientele around the world. Download the Certification