A couple of other things (for when you have time):
1. After selecting the sub-category (i.e. Tru Stone), the next page shows all the stones with "more info" and "add to cart" icons. IMO, the links are too close together, especially when you have all of that space on the right.
2. Why is the "add to cart" icon there at all? if you select that, it doesn't give you any further options (i.e. style). Are you just ordering it in the style shown in the picture? If that were so, on the checkout (or view cart) page it should specify that that's what the order is (i.e. red and black spotted stone - Ming)
3. In each selection box, there's three links that do the same thing (Name of the Stone, Picture of the Tip, and More Info), when there only needs to be one.
IMO, there just needs to be a picture of the tip/stone that when clicked on opens a larger picture (for more detail), and to the right a link that says "Select" (or something of that nature) that then takes the person to the next step (the style). The add to cart link isn't needed, nor is the hyperlink for the name of the stone.