Fender Minerals has so many beautiful items I don't even know where to begin. Check out, for instance, this gorgeous piece of malachite (already one of my favorite stones):
|Polished Bullseye Malachite Nugget from Fender Minerals|
The little crystals in there are awesome! I've never seen that in malachite before.
If green's not to your taste, there's always iridescent chalcopyrite—the aptly named "Peacock Ore."
|Peacock Ore Chalcopyrite Ray Mine Specimen from Fender Minerals|
Something like this would be great in a little knick-knacks display shelf. This is what you'll find in my curios cabinet when I'm an old lady, instead of creepy ceramic children.
Fender Minerals also carries polished fossils that are ready to be drilled or wire-wrapped for jewelry. Here's one of my favorites, an orthocera.