Though this couple has already called it quits, after two weeks (sad)...this Cartier fancy yellow emerald-cut diamond with white diamond baguettes is still the envy of many women.  Wonder who's keeping it?

The American Idol runner-up, 23, started showing off this classically cut colored stone from actor Nick Cokas, 42, in November. This oval cut yellow diamond with pink pave diamonds set in platinum is estimated at $100,000.

The round center diamond set in a melee diamond wreath mounted on a two millimeter channel set diamond band (diamonds half way around) was given to her by fiance Michael Bolton a few years back.  This sparkler is estimated at $150,000.

Howard Stern, 53, proposed on Valentine's Day to Beth Ostrosky with this art deco-style sparkler. This emerald-cut diamond with side stones set in platinum is estimated at $250,000.

Hayek, 41, wears and oval-cut diamond with trillions in platinum estimated at around $200,000.

Hewitt, 28, said yes when Scottish actor Ross McCall, 31, presented her with this antique family gem in November. This round solitaire diamond with floral diamonds is estimated at $45,000.