one way to help is to link each product using keyword based anchor text to the next item and so on in each categroy and also have each item link back to the category that the product is in.

So for example

under necklaces you would have in the descrition of the spider web necklace a link to "Angel Necklace" and anther link to the main category page. Then in Angel necklace you would link to "Zig Zag Necklace" and a link to the main category page etc..