crystals

Would like to start playing around with Menthol Crystals. Do anybody know where I can get some? I'm sure I used to see it a lot in the past but as luck would have it now that I want it it cannot be found. I tried a local Dischem but when the lady asked what I want to do with it and I said for...

I have some Swarovski crystals, although they have some sort of coating on the back, so I spose they're closer to "embellishments" than crystals, Id like to set them into drilled pockets on a brushed aluminium plate and was wondering what a decent method would be. Hot melt glue's out of the...