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Enchanted Cut Score


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Browsing the addictive diamond finder I have noticed that Enchanted give a cut score out of 100 yet this I don't see this on the GIA report so is this their own score system that sits along the the GIA report?

 

Yes! And this is why it works!
 
Our Cut Score is revolutionary because it allows us to accurately predict the brilliance of a diamond without ever having to see it. Naturally, there is skepticism as to how this is possible, since this has never been done before. The goal of this post is to show that our Cut Score is not magic, but geometry and physics.
 
When light travels between materials of different densities, it "bends." A common case of this is when there is a straw in a glass of water, and the straw seems to be broken into two pieces. The bending of the light shifts the image of the straw in the water. The amount by which light bends can be determined by "Snell's Law," using only the angle of the incoming light ray and the properties of the materials (specifically the "Index of Refraction").
 
SCIENCE FACT:  Index of Refraction physically represents how much light slows down inside the material. The IoR of diamond is 2.42, which means light travels through it at 1/2.42 times its normal speed. 
 
SCIENCE FACT 2: The "real" path is the quickest way between two points on the light ray. ANY other continuous path between those two points would take longer for a photon to travel along.
 
When light is moving from a dense to less dense material (such as from diamond to air) at the proper angle, the light will reflect instead of going through. This phenomenon is called "total internal reflection." The "critical angle" at which this occurs is the angle at which Snell's Law stops working.
 
Diamonds are cut in such a way as to use total internal reflection to make the stone appear brighter than it's surroundings. An ideal cut would cause light to come in through the top, reflect of the back, and exit through the top. Light rays should not go through the stone. 
 
The takeaway from this is that light paths can be predicted very precisely using the dimensions of a stone, a set of equations, and nothing else.
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FWIW, Snell's Law keeps working at all angles; it allows to predict the angle at which TIR stops (or starts occurring). And again, FWIW, AGS have been using ray tracing for the brilliance/brightness component of their cut score since 2005, so there isn't much "revolutionary" about that.

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Thread locked due to Forum Rules violations.

 

Joshua: You are now under public notice that if you commit any further Forum Rules violations, you will be removed from the forum, and Enchanted's diamonds will be removed from the Diamond Finder effective November 1st.

 

Thank you in advance for your cooperation.

 

Hermann

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