Wedding and gift registry Web site Weddingchannel.com has launched a complete pre-engagement guide, including a ring-trend gallery and proposal planning tips.

For future brides, it's all about creating the illusion of a luxe, high-priced engagement ring, says the site, which can be achieved with cultured diamonds, a "double-duty" ring or a "double halo" setting. Double-duty rings, which showcase three rows of round- and radiant-cut diamonds across a wide band, can serve as both engagement rings and wedding bands, thus cutting down on cost.

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