I actually made this one a long time ago, and it has held up very well, in my opinion. Since it is worked with wire, it will probably kill your hands. Every one I have has.
Step 1: Needed Materials and Other Notes
-Florists wire in desired color
-a size J (6.00 mm) crochet hook
-a small or medium sized shank button
-The wire is thick and you have to pull big loops to make it work properly. It is the wire crocheting equivalent to crocheting loosely.
Step 2: Begin the Clasp and Make the Slip Knot
This pretty self explained. You make your slip knot. I would advise making it LOOSELY around your hook