Barnwood Blue Castle Rock has a color range reminiscent of weathered wood that may include tones of blues, charcoals, whites, grays, and tans. Like worn weathered wood veining, there can be occasional greens, browns to buffs, and blacks. Split to rough squares and rectangles, it ranges in heights from 4″ to 12″ and lengths from 4″ up to 24″ for both full and thin veneer stone.