For the many couples who become engaged on Valentine's Day, Tiffany & Co. is the premier resource for the absolute best: stunningly beautiful diamond engagement rings that are, by any measure, without equal.

Tiffany diamonds, the world's finest, are cut for maximum brilliance and according to strict proportions to ensure perfect balance and precision.

In addition, all diamonds are set in platinum, which complements as well as strongly secures the diamonds in their settings.

Tiffany's incomparable array of ring designs includes Lucida®, one of the rare patented diamond cuts and a masterpiece of modern design. The square mixed-cut shape, with high step-cut crown, wide corners, and brilliant-cut pavilion, highlights the diamond's unique ability to gather, refract, and disperse light.

Lucida and all Tiffany ring designs are the dazzling result of uncompromising dedication to quality and craftsmanship.

Tiffany is one of very few diamond retailers to operate a diamond evaluation laboratory where experts independently grade stones.

Just 1-2 percent of 'gem quality' stones (stones of superlative clarity and color) meet the jeweler's standards.

Tiffany experts also assist couples in choosing a ring style that will reflect taste and personality for a lifetime. This includes selecting a wedding band -- for both bride and groom -- that fits comfortably and complements other jewelry.

Wrapped in the Tiffany Blue Box®, each Tiffany engagement ring comes with a customer service guarantee. Just as the engaged couple trusts in each other, they can trust in Tiffany & Co. for designs of lasting value to celebrate all of life's memorable occasions.