This ring from Rina Limor features a round-cut center stone surrounded by smaller diamonds, both around the center and on the band.

In the "Beloved" solitaire from Hearts on Fire, the center stone is surrounded by smaller diamonds.

Round solitaire diamond with a platinum band from Harry Winston.

Round diamond set in "Candy" mounting in 18K gold from Alex Sepkus.

Round-cut diamond set in 14K white gold from macys.com.

"1895 Collection" platinum and round-diamond ring from Cartier.

This Simon G ring features a round-cut center stone and diamond band with one row of pink stones set in gold.

A classic design from Tiffany and Co., this solitaire diamond is held by six prongs on a platinum band.

This Ritani ring features a round-cut center stone with micro pave diamonds in a white gold setting.

Round diamond ring from A.Jaffe.

Round-cut diamond set in 18K white gold and surrounded by several smaller round micro pave diamonds in the band from Uneek Jewelers.

Round diamond in 18K white gold setting from Memoire Boutique Bridal Collection.

A platinum ring with a round center stone flanked by two smaller stones. This ring is from Rina Limor.

"Ellen" platinum setting for round diamond, by Erica Courtney, from Michael C. Fina.

An art deco-style ring from Doyle & Doyle, this setting features an Old European center stone.

This flora diamond ring from McTeigue & McClelland features an Old European round-cut diamond and is set in bloomed yellow gold.

A classic style from Novell, this ring is a platinum semi-mount engagement ring with two smaller side stones and one larger center stone.

"Felicity Ribbon" platinum and round-diamond ring from Hearts on Fire.

This Rina Limor engagement ring has an antique design and is set in platinum with three stones in the middle and smaller stones in the setting.

Round-cut engagement ring with pave diamonds in the setting and on the band from Erica Courtney.

This floral-design engagement ring from Ritani has a round center stone with micro pave encrusted petals and micro pave diamonds on the mounting. The setting is white gold.

This ring features a round center stone flanked by two smaller stones on either side and micro pave diamonds on the band and setting. Ring from Simon G.

A platinum setting with a round-cut center stone surrounded by micro pave diamonds from Varna.

This Rina Limor engagement ring features a round-cut stone with smaller diamonds around it and a platinum band.

Round diamond in platinum setting from Tiffany & Co.

A modern and unique design, this "claw" ring from Solange, 212-879-9100, holds a round-cut diamond in the center of a platinum setting.

A round diamond is surrounded by smaller round diamonds in the setting and includes a diamond band from Harry Winston.

Round-diamond ring with diamond band from A.Jaffe.

This diamond flora ring from McTeigue & McClelland features an Old European round-cut diamond with rose-cut diamonds in the setting. It is set in 18K bloomed yellow gold and platinum.

Micro pave setting with heart prongs from Ritani.

Platinum "shared prong" semi-mount for round diamond from Gumuchian.

18K white gold semi-mount for round diamond from Michael M.

Platinum and scalloped diamond engagement ring from Cathy Waterman.

Gold-set engagement ring with round center stone surrounded by beveled diamonds from Erica Courtney.

Handcrafted custom-made micro pave diamond band and bezel setting for round stone. Eva round ring in platinum from Jean Dousset.

Round-cut center stone set in a platinum pave diamond band from Uneek Jewelers.

Round-cut diamond engagement ring set in 14K white gold from macys.com.