Due to internal graining and clouds, this is a relatively dull diamond that lacks sparkle. Critical factors that would alert consumers and retailers to this fact are not mentioned in the GIA grading report.

Graining is not mentioned on the GIA grading report below the diamond image. The hazy milky appearance, likely a result of both the clouds and internal graining, is probably the reason for the diamond being downgraded to SI1.

The left image, captured using GIA-developed hardware, trains IBM Research’s artificial intelligence (AI) software to recognise inclusions and reflections of inclusions. In the right image, the AI system has identified inclusions (marked green) as distinct from the blue-marked reflections. The AI

On the Holloway Cut Adviser (HCA) the best cut diamonds score below 2.0 and the worst score 10. The diamond referenced in this article scores HCA 5.0 and is shown to be small for its carat weight.

These two DiamCalc ray trace images show an ideal Tolkowsky proportioned model on the top, with most of the ray being returned after two pavilion reflections. In the model at the bottom of the stone discussed in this article, almost all light has completed multiple internal reflections before exitin