We can't get enough of platinum, one of the most popular -- and sturdy -- metals to have your engagement ring set in. Here are some of our favorite platinum and white gold set rings.

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

Aura cushion micro pave ring from De Beers.

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

Round solitaire diamond with a platinum band from Harry Winston.

Custom-made micro pave diamond band and bezel setting for a cushion-cut diamond. Eva cushion ring in platinum from Jean Dousset.

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

Asscher-cut yellow diamond ring with fancy-shaped diamond shoulders in a platinum setting from Graff.

Extremely rare fancy-intense pink diamond ring in platinum setting from Harry Winston.

Ruby diamond ring set in platinum from Oscar Heyman, 800-642-1912.

Classic emerald-cut diamond engagement ring from Harry Winston.

Cushion-cut diamond split-shank ring set in platinum, Tiffany & Co.

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.

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

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

Micro pave cushion-cut diamond ring with platinum setting from Michael C. Fina.

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

Emerald-cut yellow diamond with fancy-shaped diamond shoulders in a platinum setting from Graff.

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

Asscher-cut diamond in a platinum setting from Harry Winston.

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

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.

Asscher-cut yellow diamond in a platinum setting from Harry Winston.

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

This Victoria round ring from Jean Dousset features a micro pave and U-set diamond band and bezel setting for a cushion-cut diamond.

Micro pave setting with heart prongs from Ritani.

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

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

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

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

Cat's-eye diamond ring from Oscar Heyman, 800-642-1912.

Yellow cushion-cut diamond ring with white pear-shape diamond shoulders from Graff.

A radiant-cut intense yellow diamond surrounded by six brilliant-cut diamonds in a platinum setting by McTeigue & McClelland.

Emerald-cut diamond ring with two trapezoid side diamonds in a platinum setting from Michael C. Fina.

Cushion-cut diamond engagement ring with halo pave setting in platinum from OGI Ltd.

Micro pave cushion-cut engagement ring in platinum setting from Harry Winston.

This Riviera cushion-cut diamond engagement ring features a partial micro pave-accented band and prong setting in platinum. Ring from Jean Dousset.

The Tiffany and Co. Novo engagement ring featuring a brilliant cushion cut in a platinum setting.

Princess-cut engagement ring from Kwiat.

Handcrafted princess-cut diamond ring from Kirk Kara.

Ruby and diamond ring set in platinum from Oscar Heyman, 800-642-1912.

Emerald-cut engagement ring set in platinum from De Beers.

This modern cut, created in the 1960s, boasts an elliptical shape that appears larger than a round stone of the same carat weight. Oval-cut engagement ring from Harry Winston.

Fancy yellow diamond ring set in platinum from Oscar Heyman, 800-642-1912.

Princess-cut diamond ring in platinum setting from Diana Classic.

Platinum-and-diamond setting for emerald-cut center stone from Tacori.

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

Asscher-cut diamond in a platinum setting from Bulgari.

Solitaire engagement ring with platinum setting from Harry Winston.

Alex diamond ring in a platinum setting from Oscar Heyman, 800-642-1912.

Platinum and princess-cut diamond semi-mount for princess-cut center stone from Peter Storm.

Pear- and marquise-shaped diamonds in a platinum setting from Ritani.

Pear-shaped diamond engagement ring set in platinum from Harry Winston.

Crisscut cushion diamond center stone surrounded by round diamonds and set in platinum from Christopher Designs.

Platinum and scalloped diamond engagement ring from Cathy Waterman.

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

Custom-made micro pave diamond band and bezel setting for an emerald diamond. Eva emerald ring set in platinum from Jean Dousset.

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

Set in platinum, this ring from Uneek Jewelers features an emerald center stone.