Description

Variety: tourmaline, bi-color
Carat weight: 0.87 cts
Measurements: 6.7x4.8x2.9mm
Color: green-orange
Shape: emerald cut

I am a physicist, gemologist, long time collector and gem cutter. I posted on Pricescope under name of zeolite from 2008-2019.

Bi-color tourmalines that are eye-clean (1X, no magnification) are close to non-existant. The chemistry that allows the two colors, seems to upset any orderly atomic arrangement during the change of color. This picture, shown at 2X, should show visible imperfections. It doesn't. But if you tilt the gem somewhat, you can see very small linear dislocations at one certain angle. So let's say it is VERY CLEAR for a bi-color tourmaline, but not eye clear. I reject 98% of bi-color crystals that I examine, because the finished gem will not show the clarity that I desire. The picture was taken in daylight, cool light.