Marquise

The name for this cut comes from 18th-century Versailles, where courtiers wore ship-shaped rings as a sign of their rank. Today the marquise can be set vertically, like Victoria Beckham wears, or sailing across the finger, as Catherine Zeta-Jones's horizontally set, 10-carat marquise does.

5-carat marquise-cut diamond in platinum, Neil Lane, $175,000;

neillanejewelry.com.

11.17-carat marquise-cut diamond in platinum, Bulgari, price upon request; 800-285-4274.

2.39-carat marquise-cut diamond and pave diamonds in platinum, Tiffany & Co., $75,500; 800-526-0649.

Marquise-cut diamond in platinum, Tiffany & Co., $50,500; 212-526-0649.

.75-carat bezel-set diamond, bezel-set blue sapphires and micropave diamonds in platinum, Ritani, price upon request; ritani.com.

Marquise-cut diamond and pave diamonds in platinum, Jack Kelege, price upon request; jackkelege.com.

3.3-carat marquise-cut diamond in platinum, Fred Leighton, $65,000; 212-288-1872.

1.16-total-carat-weight marquise-cut diamonds in platinum, Suzanne Felsen, $10,500; 310-315-1972.