I was on a bit of a tight schedule and no local craft stores had cameos or appropriately lacey settings for such things, so I improvised and bought two sets of earrings from one of the jewellery stores nearby. I already had a bunch of Swarovski and other crystals in the soft, peachy pinks I wanted to use and my trusty bottle of gemstone glue. So first, assemble materials!
Next I cut the earring bars from the back of the two earrings using wire cutters and filed the stumps down so they were smooth and wouldn't scratch or catch on anything. I also undid the jump ring holding the little bow to the cameo setting, so I could place the bow differently in the finished piece.
After that, all there is to do is lay it all out how you want and glue it together! The gemstone glue dries clear so you can't see it at all when it's completely dry. Still, it's a good idea to wipe away excess glue with a damp cloth.
One thing I did find helpful was to place a small rectangle of medium weight interfacing between the two earring pieces and glue each earring piece to that. It gave it a better surface to hold to and is nice and sturdy. I did the same when adding the brooch pin to the back, you can see it here:
The finished brooch is quite large, but I think my aunt will like it! You don't have to massacre earrings to make these, you can order unset cameos and lace backings online (I love some of the ones on Etsy!) or you might be lucky enough to have a craft or beading store nearby that stocks the materials!