- EGL – European Gemological Laboratory or EGL is a privately owned, for-profit, gemological lab.
EGL has numerous labs around the world. They provide diamond certificates that detail key information on the stone, such as the 4 C’s: carat weight, color grade, clarity grade and cut grade. 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. The GIA is considered the leading diamond grading laboratory in the industry.
- Emerald Cut – See Shape.
The emerald cut was designed for emerald stones, notoriously fragile and easily broken. This rectangular cut has become increasingly popular in recent years with many celebrities opting for large emerald cut diamond engagement rings. One the advantages of emerald cut diamonds is that they appear larger than many diamond shapes of the same carat weight thanks to the size of the diamond’s table. However they lack the brilliance of round diamonds and any inclusions in the stone are easily visible.
- 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.