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 molten lava flow which trapped air that later escaped during the cooling stage. The result was a porous stone, rugged in appearance, light in weight and enduring in character. Beyond its uniqueness and natural beauty, Featherock provides both material and working cost advantages.