The Vivid White Diamond

 typical run-of-the-mill diamond has an efficiency rating of 35.5% and an A.L.R rating of five (5). Translation: The typical diamond returns 35.5% of refracted light back to the viewer’s eyes; leaks/wastes 64.5% through the pavilion floor of the diamond and only redirects the light internally five (5) times before it leaks out or is returned to be viewed.
A pinball machine is a good analogy here. Think of every ray of light as a pinball. Once the pinball is shot (refracted) into play within the machine (diamond) you score more points (flashes of light) every time the pinball bounces around (internal light reflections) before it is returned back to you in the form of sparkle. Sparkle equals efficiency rating x internal light reflections. So we could say that the typical diamond returns 35.5% of absorbed light and amplifies it five (5) times to give you a sparkle return of 177.5%. You get 77.5% more light then you put in even though there was a lot of waste. This is why most people who see practically any diamond will,at first blush, be impressed. The truth is even bad diamonds look pretty good. But, what if we’re not just looking for pretty good? What if our goal is to have the highest efficiency rating; the highest amplified light return? What would that look like? Well, let’s see, if we are going to hold the most breathtaking diamond in the world we’re going to have to be patient, and I mean really patient! The typical diamond that is cut these days is cut from two types of rough (name for what diamonds look like out of the ground) macles and flats.

Macle