Brilliance

The radiation, liveliness or sparkle emitted by a stone when light is reflected from the surface and from the total internal reflection of light.

Bezel

A metal rim that holds a stone and completely surrounds it. Bezels can be molded into any shape to accommodate the shape of the stone.

Baguette

A rectangular-shaped stone with rows of step-like facets. A tapered baguette is one with two long sides that taper inward.

AGS

The American Gem Society is a trade association of retail jewelers, independent appraisers, suppliers, and selective industry members, which was founded in 1934 by Robert M. Shipley, who also founded the Gemological Institute of America.