1) How do you glue a cabochon into a setting that doesn't have a back? If I glue around the edge, I still have problems with it being too easy for the cabochon to come off.
2) Besides the metal settings that are sold, are there other ways to create a setting that would allow a cabochon to become a pendant without drilling a hole in the cabochon? Thanks.
Glue-in cabochon settings have enough gluing surface area for the cabochons to fit. Make sure to use the proper glue for the job. Pascofix® adhesive is an extremely strong instant glue that will keep your cabochon in place. If you require a longer dry time, use Devcon® 5 Minute® Epoxy, 2-part Epoxy; it dries clear and strong.
Another option for setting cabochons are the no-glue Cab-Tite™ settings. They make setting cabochons a breeze as all you need to do is snap the cab into the setting with your fingers, make adjustments to the prongs as necessary, and then it's ready to wear. They come in both pendant and earring versions.
You can also make your own cabochon setting by wrapping it in wire, as was done for the beautiful pendant with blue lace agate listed below. Or glue the cabochon to Lacy's Stiff Stuff™ and use a beading needle, thread and seed beads to bead-embroider or peyote stitch a bezel as in the ornate triple-strand necklace listed below.