This is my second concrete and cedar sculpture. Working upside down, inside out, and backwards is hard. Concrete molds are a negative of the finished piece. I used regular 4000 PSI concrete. No colorant. I like the idea of not trying to disguise the nature of the concrete. One of the things I like about concrete is its plasticity while casting and setting. The juxtaposition of the plasticity when working with it as opposed to the absolute rigidity of it when it cures appeals to me. The contrast between the the warm quality of the cedar and the hard coldness of the concrete is why I call it Mirror Mirror. It is 4 inches thick by 14 inches long by 16 inches tall. The concrete makes the piece quite heavy.