- EGL - European Gemological Laboratory or EGL is a privately owned, for-profit, gemological lab.
EGL has numerous labs around the world. We have found that their grading differs from that of GIA.
- EGL-USA -EGL USA split from EGL and became independently owned in 1986.
It has labs in New York, Los Angeles, Vancouver and Toronto. We have found that their grading differs from that of GIA. See an example of a EGL USA report.
- Emerald Cut- See Shape.
- Etch Channels - angled openings (inclusions) at the surface, which protrude into the diamond.
- Extra Facet - sometimes, the cutter will add an extra facet.
Sometimes, the cutter will add an extra facet (so, there are 59 on a round brilliant, for example) often around the girdle, in order to remove an inclusion. While this is not optimal, an extra facet does not necessarily reduce the value of the diamond. The size, positioning and effect of the extra facet on the diamond's symmetry will determine any variance in the value.
- Eye-Clean - When a diamond has no inclusions visible to the naked eye.
Typically, when the diamond is of SI quality or better.