Mary-Kate spices up a solid black dress by adding some bold jewelry. The ring definitely catches your eye and a closer look reveals that it is actually turquoise.  The ring is a round, cabochon cut with stones circling around the perimeter--looks as though the stones are diamonds. Ross-Simons Estate Collection has a very similar ring, seen below. Circa 2000, this ring is only 9 years old. The turquoise is surrounded by .75 carats and set in 18k white gold. Priced at $1836--Mary-Kate's is most likely more!