Oval

Ovals have been enjoying a high profile since Tom Cruise placed a gorgeous one on Katie Holmes's finger. The cool cousin of the round, the oval shares many of that stone's features, with plenty of sparkle and versatility when it comes to settings. The long shape is especially flattering.

3.2-total-carat-weight oval-shaped diamonds in platinum, Harry Winston, price upon request;

harrywinston.com.

1-carat oval-cut diamond and pave diamonds in platinum, Cartier, $17,250; 800-227-8437 for stores.

5-carat oval-shaped diamond and 1-total-carat-weight diamonds in platinum, Jacob & Co., $78,000; 212-719-5887.

3-carat diamond in platinum, Tacori, price upon request; tacori.com.

Oval diamond and .79-total-carat-weight pave diamonds in 18kt white gold, Simon G., price upon request; simongjewelry.com.

.97-carat oval-shaped diamond and .44-total-carat-weight round brilliant-cut diamonds in platinum, Kwiat, price upon request; kwiat.com.

2-carat oval-shaped sapphire with .4-total-carat-weight diamonds in platinum, Blue Nile, $5,300; bluenile.com.

.79-carat oval-shaped diamond in platinum, Martin Flyer, $6,370; martinflyer.com.

1.6-carat oval-shaped diamond with princess-cut and brilliant-cut diamonds in 18kt white gold, Chanel, $62,000; 800-550-0005.

1.75-carat pink diamond and 1.50-total-carat-weight diamonds in 18kt pink gold, Neil Lane, $120,000; 310-275-5015.

1.20-total-carat-weight pink diamonds in 18kt pink gold, Neil Lane, $9,500; 310-275-5015.

2-carat oval-shaped diamond with .65-total-carat-weight diamonds in platinum, Fred Leighton, $18,000; 212-288-1872.

2-carat yellow sapphire and diamonds in platinum, Cathy Waterman, $8,500; at Barneys New York, 212-826-8900.

1-carat pink sapphire and diamonds in platinum, Bailey Banks & Biddle, $11,000; 800-651-4222.

6.15-carat diamond and 2.22-total-carat-weight diamonds in 18kt white gold, Martin Katz, price upon request; 866-956-7200.