First, find some pretty stones. Look for ones that have a flat side that will be easy to adhere to the flat surface of the ring. I found mine at flea markets and gift shops in the mountains.
You will also need ring bases, which can be found at craft stores. Look for something sturdy enough to hold the weight of the rock. You'll also need a strong adhesive, which can also be found at craft stores.
Now for the super easy part! Just glue the flat side of your stone to the ring base. I let mine dry overnight.
And voila! Now you have a fabulous ring! And the best part is getting to say "I made it!" when someone asks where it's from :)
Let me know if you attempt this DIY and how it turned out!