A solitaire style setting, usually a ring, with a four or six prong head or setting. The original solitaire setting was designed by Tiffany & Co., hence Tiffany.
The high-pronged setting most common today for large stones such as a diamond solitaire, this setting was introduced by Tiffany & Co. in 1886.
A round, six-pronged setting. Popularized by Tiffany & Co., New York, the "Tiffany" setting has long, slender claws flaring out from the base.