Great Diamond Shapes

3-carat pear-shaped diamond with tapered baguettes in platinum,

Harry Winston, price upon request; 800-988-4110 or harrywinston.com.

1.61-carat cushion-cut diamond with pave accents in platinum,

Daniel K, $40,600; at Tiny Jewel Box, 202-393-2747.

1.5-carat brilliant-cut round diamong with .57 carats of side stones in platinum,

Scott Kay, $19,700; 866-654-5418 or scottkay.com for stores.

2.44-carat Asscher-cut diamond with diamond accents in platinum,

Neil Lane, $41,000; 310-275-5015.

2-carat princess-cut diamond with side stones (.7 total carats) in platinum,

Jeff Cooper, $22,000; at Robbins Bros., 800-610-7464 or robbinsbros.com.

2.01-carat emerald-cut diamond with two tapered baguettes

(.34 total carats) in platiunum, Kwiat,

$29,375; 800-927-4367 or kwiat.com for stores.

1-carat oval-cut diamond with pave accents in platinum,

Cartier, from $17,250; 800-227-8437 or cartier.com for stores.

1.76-carat radiant-cut diamond with pave accents in 18kt white gold,

Blue Nile, $12,300; 88-565-7641 or bluenile.com.

3.3-carat marquise-cut diamond in platinum,

Fred Leighton, $65,000; 212-288-1872.