Probably the neatest thing about these scanners is that you can either scan in photos of your work, or (if the item isn't huge) very often you can lay it out on the scanner, close the lid, and scan the piece. Voila! You have an instant scanned image. Then you can save it into a .jpg, .gif, whatever format you like.
Now, I have to admit that for whatever reason not all scanners will do a decent job of scanning in flat objects like jewelry. I have found that Visioneer OneTouch scanners have worked for me, but I once had a Hewlett-Packard combo scanner and printer, and it did such an awful job of scanned jewelry that I took it back. I did call their customer service people first, but the guy thought I was a loon when I tried to explain that I was scanning in actual jewelry pieces.