This is a very cool idea for a concrete table with a fire pit embedded in the middle. Imagine a small pinon wood fire to keep off the mosquitoes or roasting a few marshmallows at the table. Very hippy.
A polished concrete fire pit table made with Oak, sea shells, marbles, crushed glass, crushed slate, a white cement and aggregate mix with glass fibre strands and Nylon mesh for strength and phenolic insulation to make it more lightweight