This Instructable shows how to transform an IKEA TORE file cabinet base into a slate top coffee table. The total cost of this project was $16, though I had some materials on hand.
Step 1: Materials and Tools
Materials required to build this table
1) The TORD file cabinet base: This isn't really a table -- it's the base for a file cabinet. I scored one in my local IKEA's as-is room for $9.99.
2) Slate (or some other stone of your choosing): Slate is available from your local big box home store for about $1.00 USD per 12" square tile. I used six of these tiles.
3) Plywood: Underneath the slate is a piece of plywood roughly 21" x 27" x 5/8". For this table the smallest "handy panel" size will do. I suggest you use the lowest grade plywood you can find. MDF might work in a pinch, but the weight of the stone top may cause MDF to sag over time.
Tools required to build this table
1) A circular saw, table saw, jig saw, or any other saw capable of cutting plywood. As we'll see in Step 3, you may not need this.
2) A tile saw, jigsaw (with carbide grit blade), circular saw (with diamond blade), hacksaw, or any other saw capable of cutting stone. As we'll see in step 4, this may not be required.
3) A chisel, file, or Dremel. This is needed to make small notches in the plywood backer in Step 3.