Often the design is very elaborate and consists of intertwined branches, leaves or flower patterns. The main characteristic is the flowing style or intertwining of the elements of the motif.
The technique originates from Baghdad in the 10th century. It was very popular in the Muslim world in both architecture and other design mediums.
The technique was used not only on jewelry, but also on jewelry boxes itself. The final result is a piece which is both romantic and feminine with a filigree appeal and look to it. The style is also very popular as etching on lockets. Cameos are also styles of jewelry which are set in Arabesque frames.
Here are some examples of arabesque patterns:

