I have to agree with Dave on the domain name. As for redesign I think your site looks ok... if it was me I would make it look more detailed. Maybe some shinny images. Some elements of flash on the diamonds to make them sparkle. Things like that. It wouldn't hurt to have an SSL cert that people can click on that always makes them feel better about buying I see that you have all other logos and links but not that one. I feel its an important one.

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