![]() So, I brought in my business partner Jay to help leverage both of our backgrounds in modeling risky financial assets. It seemed like pricing was random at times, with similar diamonds sometimes shown at wildly different prices. Quick StoneAlgo Backstoryīack in the day, when I was first looking for a round diamond for my now wife, I had a difficult time understanding the way diamonds were priced in the online market (let alone at the jeweler). all factor in).Ĭontinue reading for more details on why we created the diamond cut score, the limitations of GIA and AGS cut grades, and how cut quality effects diamond pricing (or doesn't in certain situations). Keep in mind that your ability to see these arrows depends on the image you view online (angles, lighting, etc. See the below GIF showing a 6.0 cut score diamond with a very wide center versus a 9.6 cut score diamond with a tight circular center and more visible arrows. If you don't have access to our cut score you can follow this simple rule of thumb: a perfectly cut diamond will have a tight, circular center positioned in between dark arrows that point out toward the edge of the diamond. For example, a higher pavilion angle is complemented by a lower crown angle and vice versa. ![]() These angles move together to completement one another in different ways. What the tables show are the combinations of table %, pavilion angle, and crown angle that produce and excellent/ideal, very good, or good cut diamond. You can explore the GIA cut grade tables and AGS cut guidelines for more details on these ranges. The GIA and AGS have published their own static tables showing the measurements that qualify a round cut diamond as Excellent or Ideal cut. To calculate our diamond cut score, StoneAlgo uses a proprietary formula that compares the angles and dimensions of your diamond to the ideal angles and dimensions for light performance (a theoretical diamond that would receive a 10.0 cut score) ![]() 0's are below average Fair cut diamonds.2's are below average for Good cut diamonds, and above average for Fair cut diamonds.4's are below average for Very Good cut diamonds, and above average for Good cut diamonds.5's are average for Very Good cut diamonds.6's are below average for Excellent cut diamonds, and above average for Very Good cut diamonds.7's are average for Excellent cut diamonds.8's are above average for Excellent cut diamonds.9's are the very best Excellent cut diamonds.10's are totally perfect (they don't exist - they would require extremely precise measurements that we can't get from a GIA certificate).Here's a layman's approach to understanding our cut score grades: This score can help you identify the most exceptionally cut diamonds and avoid duds. StoneAlgo's diamond cut score predicts how sparkly a round cut diamond is on a simple scale from 1 - 10. How Does StoneAlgo's Cut Quality Score Work? Diamond cut score is StoneAlgo's measurement of how perfectly cut a round diamond is in order to maximize light performance (fire, brilliance, and scintillation).
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