The most recent Action Pack has directions to wrap a pretty stone or shell in twine or wire to make a pendant. I'm not sure why this never occurred to me before. I've seen necklaces for sale constructed in this way, we've made necklaces out of shells before (the ones with the pre-existing holes, though), and I have jewelry wire right in the art/craft table. I also have some beautiful, small pieces of polished purple quahog shell, so I decided to give it a try.
I quickly learned this is one of those things that is a little trickier than it looks. I chose some fairly thin wire, about 28 gauge, so as not to overwhelm the delicacy of the shell, but with my first attempt I didn't feel the loop was terribly secure. I didn't think to take a picture; I just took it apart and tried again. The second time, I strung the wire through a small bead, curved a loop, brought the wire back through, and then twisted the wires around each other a couple of times. I then had two longish pieces of wire to wrap around the shell, and the loop felt much more secure.
I searched my jewelry box for a thin, delicate chain to match, but realized I didn't make a big enough stringing loop to get a jump ring through. Next time, I'll put the chain through, then size the loop down and continue wrapping, but for now, I used a ribbon and cord concoction that used to hold a pendant, which broke the second time I wore it.
The great thing about this, of course, is that it's fairly easy to take it apart and try again. Also, the beach is full of shells.