the duty free doesn't sell swaroski crystals to make jewellery.

I know there is this place called "bead world" near RC which sells lots of crystals, but i am not sure if they are real swaroski crystals. But you might want to check it out.

Also becareful when you buy them, they might show you real swaroski crystals but give you fake ones once you buy it. (ie. crystal mall, parker place, etc)