This is a porous, round, black volcanic material. Commonly used for xeriscaping and fire pits. Also available in a variety of sizes.
Applications Include

Flower Beds / Garden Beds

Fire Pit / Fire Place

Xeriscape
NOTICE: Product is unwashed and usually contains between 1-5% fines but never more than 20%. Color and gradation may vary. Roundness and sharpness may vary. Overall size may vary.