Patent ID: 8667752

Claim:
A construction block unit having a first surface, a second surface opposite the first surface, and a plurality of sides separating the first and second surfaces that cooperate with the first and second surfaces to define a volume of the block, wherein at least one of the plurality of sides of the block is defined at least in part by first and second twisted facets that converge toward an intermediate plane located between the first and second surfaces of the block, the intermediate plane having a shape that is substantially the same as portions of the first and second surfaces that project on the intermediate plane, the intermediate plane being rotated with respect to the first and second surfaces by an angle in excess of zero degrees, each of the first and second facets having a surface that twists along the side of the block, the twisting surfaces of the first and second twisted facets cooperating to define a surface that transitions from a concave surface to a convex surface along the side of the block.