DIY Rough Crystal Soap and Silicone Caulk Mold Making Tutorial from Fall for DIY. This is a very cool soap making DIY with endless possibilities using different color combinations. I also liked the version of soap that was not carved to look like a crystal. Melt and pour soap makes this an easy DIY.
If you love the look of rough crystals, I posted a roundup of 12 rough crystal jewelry DIYs with tips on search words for the right crystals here and a gorgeous DIY rough crystal necklace here.