A couple of things I see immidiatly. You are using high quality materials for your wares, real copper, nice pieces of jade, etc. But your lighhting and preperation in the photos is really bad. Semi translucent gemstones need proper lighting when you are photographing them. First thing you can, get a lighting kit and a soft box similar to this one: http://www.ebay.com/itm/JS-Photo-Studio-in-a-Softbox-Tent-Light-Lighting-Cube-Photography-Kit-JTK103-/251095144664?pt=LH_DefaultDomain_0&hash=item3a766fd8d8
for $35. Then read up on three point photography lighting. Also consider buying a really good flash for your camera with the ability to slave additional strobe lights so they go off when you take the picture. Sounds complicated, but it really isn't bad to set up or use, and you should be able to pick up some decent strobes with reflectors for around $50 or so, and a really good flash for around $200ish. Display semi-translucent stones on a black or dark blue matte background that doesn't reflect. Prefferably pick a fabric that doesn't pick up any dust. For the copper work, remember that the camera is going to pick up every little flaw there could possibly be. I'd reccommend taking one sample and polishing it with a dremel tool and some copper polish and a soft wheel until it gleams and has no visible scratches, and take a picture of that one. Also, it's a SLR camera, for Single Lense Reflex.
I would also reccommend you get a largish rock tumbler and some plastic or ceramic tumbling pellets and experement with putting some of your finished metalwork pieces in there for 6 or so hours (metal, pellets, a bit of soapy water. Shouldn't need any grit for that. It should give you a nice even tumbled patina without detracting from the hand qrought quality of the work and will match the polished stones really well. Plus when you aren't using it for that you can tumble your own rocks.
The other thing that you need on your store is background. The About page is a good start, but it needs some better pictures. Though that one sphere pendant picture you have there is the best picture you have on the entire thing so far. Thats what you want for all of them. , maybe some pictures of people modeling the necklaces and pendants, possibly maybe target the traditional rennisance jewlry market and have a few ren fiare people wear them in period garb. I dunno. Something to show people Huh, that looks good with X, and it's about Y. big.
Also, you might want an "I will make you a custom piece" option of some sort. I don't know if it would work logistically with how the site is set up, but it would be a draw.
I dunno, some things to consider.