First the Full Disclosure: I did not make this myself; I cannot crochet.
My mother-in-law actually made this. Probably about 20 years ago. And I think it's still pretty cool today - so I'm sharing it with you.
If you do know how to crochet I'm sure that you can figure it out. The actual necklace measures about 70 inches long! It looks like you just chain your thread and add a bead every few stitches. Pretty simple. I can see lots of possibilities with this simple idea!