As old as the Blue Ridge Mountains, Black Frost Castle Rock’s finely grained sandstone has a range of blacks and charcoals, with grays, blues, and occasional greens, buffs, and browns. Streaks and striations of white highlight this unique stone. Split to rough squares and rectangles, Black Frost Castle Rock ranges in heights from 4″ to 12″ and lengths from 4″ up to 24″ for both full and thin veneer stone.