You could always have it reset in to a ring, pin, etc...just look in your local yellow pages for a jeweler who does custom design work...it'll probably cost you, but the workmanship would be worth it!! As for the chip, they can either hide it in whatever type of jewelry you decide to put it in, or they may be able, somehow, to 'file' it down? Not sure about that part!!
A small ring with a 4 mm garnet stone in
I have a 6.5 carat oval cut garnet. Stone only. Any idea of value