Surface Treatment For Concrete Worktops - Concrete molds
pretty square concrete planters - use square buckets as molds?
Making rubber molds for concrete or hypertufa castings is ridiculously easy.
Hexagon Coaster Mold Concrete Mold Geometric Mold (38.00 USD) by BoldPrints
Cement Concrete Molds | Plaque Stepping Stone Plastic Mold Concrete Mold Cement Plaster
Geodesic Sphere SILICONE Mold - MEDIUM - Reusable Mold - Candle Mold, Concrete Mold
Geometric Concrete Mold Template
Make rubber mold with wood grain, then cast concrete. (I'll never do it, but it looks so cool!)
concrete molds column base - Google Search
Use Old Bottles to Make Chic Concrete Vases - using plastic or glass bottles. brit.co DIY tutorial