Shedding Light on a Diamond's Quality

By Donna Jolly, RJ

Rolls Royce. Hermes. Cartier. Luxury brands that evoke the best of the best, right? When thinking of gemstones, diamonds, like these brands, are on the high-end of the luxury food chain. They are a girl’s best friends. They are the ultimate symbol of status... and of love. They are Forever.

With something so precious and coveted, it stands to reason then that when you purchase a diamond, it has been thoroughly analyzed before it hits the store so that you understand its level of quality. There are several diamond grading labs that can do this, but before you buy a diamond with one of those lab’s report, it’s important you learn about the lab. In 1996, the American Gem Society created AGS Laboratories because no other labs were founded on the premise of consumer protection. None. They were all created to service the trade.

From its inception, AGS Laboratories has taken its mission seriously. It’s devoted much of its resources to not just grading diamonds, but researching them to really understand how this beautiful gem can be its most beautiful. Because of this research, AGS Laboratories uses a scientifically vetted cut-grading system, based on optical physics and proprietary “ray-tracing” software. This three-dimensional analysis traces how light performs in a diamond. That methodology is the cornerstone of the Lab’s Platinum Diamond Quality® Document. No other report is more thorough or reviews as much detail on a diamond’s light performance.

 

 

The report covers all the 4Cs with great emphasis on Cut—the C that contributes most to a diamond’s brightness. Each document has a “Light Performance” map unique to each diamond, showing you where the diamond has its most brightness versus light “leakage.” The less light that leaks out of a diamond, of course, the brighter it will be.

So what exactly is light performance and why is it important? The diamond’s cut—the layout of its facets—determines the light returned to the surface (what most refer to as Sparkle). The better and more exacting a diamond is cut, the more light is returned from the top of the diamond (known as its crown). If a diamond has a cut that is too shallow, light will leak out of the bottom. It the cut is too deep, light escapes out of the sides.

AGS Labs performance-based cut grade is available for Round Brilliant, Princess, Oval, Emerald and Cushion-shaped diamonds.

 Ask your Jeweler to show you a diamond with an AGS Laboratories Platinum Diamond Quality® Document. Better yet, ask them to show you the diamond underneath an ASET, a tool created by AGS Laboratories to illustrate light within the diamond. You’ll never look at this rare gem in the same way again!


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