I use a pillar blend when I made my chunks. Its been a while, so sorry, I don't remember which. Lately I have been using KY pillar blend and its a little too opaque for the chunks IMO. But if you want to try them, just use what you have closest to you. A lot of the suppliers will tell you which wax works well for which application. The higher melt point waxes do well for the chunks and over pour. I used a silicone mold to make my own chunks. Poured colored wax, cut up, shoved into molds, over pour clear. Worked well for me. Good luck, they are alot of fun to make. HTH Pat