Gray green slate - $5.00 »
The density of a given slate relates directly to its cost. The denser it is the more likely it is not to flake and fall apart.
Slate pros: Tends to be dark; highly resilient
Cons: Needs to be installed by someone who knows what he or she's doing, be sure to figure installation into the final cost.
Cost: $5-$20 per square foot
Suggested uses: Living areas, hallways, entryways and kitchens