From Carrie's black diamond to Charlotte's classic Tiffany solitaire, the 'SATC' crew ... In keeping with Charlotte’s classic style, the ring features a round diamond set on a platinum band.

A three-carat Lucida-cut ring from Tiffany & Co. Three's Company ... three-and-a-half-carat emerald-cut style from Louis Glick. Solitaire Pursuit: A single stunning stone is all a classicist ...