This is the most expensive bikini in the world. It is consists of 150 carats of D-Flawless diamonds and worth about 30 million U.S. dollars. Link
Designed by Susan Rosen, the bikini can best be worn only at beaches. True confession, its fall into the lingerie category is not justifiable as the fabric used for this bikini is a layer of pure diamonds and not a bit of clothe.
Model Molly Sims flaunted this designer bikini and is residing at the centerfold of the 2006 Illustrated Sports Swimsuit issue. The bikini is packed with over 150 carats of D Flawless diamonds. Other ornamental diamonds include:
1) 51 carat D Flawless Pear Shape
2) 30 carat D Flawless Emerald Cut
3) 15 carat D Flawless Rounds (pair)
4) Platinum-set 8 carat D Flawless Pear Shape (pair) [Quoted from Elite Choice]