I'm kind of into custom shell chandeliers this week. And good, elegant shell chandeliers are really hard to find.
There are lots of cheap Florida-looking shell light fixtures all over the place. But to find an unusual, sophisticated and elegant fixture takes time or requires custom designs. You have to have exquisite shells and you have to have a clean design that will show them off. Glam rock or beach cool can both be achieved with shells. But if you are not careful you can also create tacky Key West quite easily.
Shells have been used for centuries in everything from jewelry to dishes. I find it a lovely material to mix in because it creates a new texture in a room. So have fun with them and create a fresh vibe.