Featherock is the trademark name for two lightweight natural stones of volcanic origin. They come in distinctive colors of silver gray and charcoal. They are products of a rare volcanic occurrence, formed by a molten lava flow which trapped air that alter escaped during the cooling stage. The result was a porous stone, rugged in appearance, light inweight and enduring in character. Beyond its uniqueness and naturalbeauty. Featherock provides both material andworking cost advantages.