Hi suzie_d,
90% of your home page written content is embedded in flat images (at least these seem to use the alt tag). This design could easily be moved over to valid XHTML & CSS.
In my opinion the bottom 1/3 of the page looks like it is written for the search engines and not the visitor.
All of your main content keywords (eg neck, ears, wrist, hand, hair, pendant sets, earrings, pendants, bracelets, necklace sets, rings, necklaces....etc....etc) are pretty much invisible to the search engines.
A good way to see any problems is to use one of the many
SEO analysis tools online.
I rate
http://www.reactionengine.com/ and I also have started using (and rate highly) our very own Webnauts tool here
http://www.seoworkers.com/tools/analyzer.html