GSI uses the latest measuring analysis equipment from Sarin Technologies.

The Sarin machine records a series of 2-dimensional images of the actual diamond as it rotates on the pedestal. Then the computer converts them into a 3-dimensional representation of the diamond and calculates the exact dimensions, proportions and angles of the diamond by analyzing the 3-D image.

In addition to proportion analysis, the Sarin program can calculate the estimated weight of a diamond, which it then compares to the actual weight that was entered previously by a technician.

If the stone is a diamond simulant then the estimated weight and the actual weight will be significantly different. The specific gravity, or density, of diamond is 3.52, which is significantly different than most simulants.

This is the first test to make sure the stone submitted is actually a diamond; later in the lab, the gemologists also verify that the stone is a natural diamond.