Terminology
Bezel - metal completely surrounding a stone to hold it in place

Channel setting - stones are set in between two lines of metal. They can be individually set or multiples in a line.

Engraving - can either be done in the wax stage of design or added after the piece is finished. It consists of finely detailed designs etched into the metal to add visual interest. It usually is used for adding an antique look.

Filigree - an open style design detail giving a piece an antique look.

Flush set - setting a stone down in the metal even with the surface of the metal. The stone looks as if it has nothing holding it in.

Half-bezel - metal only covering half of the stone to hold it in place.

Head - the main top part of a ring holding the center stone, or is the focal point of the ring.

Milgrain - a line of tiny ball-like details added to a piece that gives it a more antique look.

Pave’ - a style of stone setting resembling a paving or complete covering of metal by the stones

Prongs - usually small wire-like part that holds the stones in the jewelry
4- or 6-prong refers to the number of prongs used for each stone.

Shank - Part of the ring that goes around the finger

Shared-Prong Setting - a set of prongs that hold more than one stone.

Solitaire - any setting that only contains one stone.

Tension Mounting - a mounting design to use only tension of the two sides of the piece to hold the stone in place. This setting style is very open.

Two-tone - usually refers to using white gold and yellow gold together in one piece, but can refer to platinum and gold and other gold colors as well.