Black Bear Mountain Stone hackett stone truly captures the old-world style with the appearance of majestic European castles of old. A variety of depths and sizes help this pattern to create an architectural elegance. The ease of installation makes this manufactured stone veneer a favorite of masons as well as do-it-yourselfers. Also known as castle rock or castle stone. Hackett stone is a stone veneer product measuring 1" to 1.5" thick and therefore thinner than traditional stone siding for easier, lighter handling. All our manufactured stone veneer products are suitable for interior applications such as stone accent walls or stone fireplaces as well as exterior applications such as stone veneer siding.