The Rain Forest 1 cm. Mini Black Polished Pebbles 20 lb. collection consists of naturally tumbled, hand-picked stones from around the world. The tumbling process results in a smooth, rounded shape that is ideal for landscaping purposes. A polish is applied to accentuate natural colors and patterns. These pebbles are complimented by a bag designed for easy handling and application, storing well with little maintenance needed. Use these polished river pebbles in residential or commercial spaces for adding a beautiful rockscape design in planters, along walkways, as decorative accents, and in creative landscaping. The polish will wear due to exposure in outdoor environment conditions. The Rain Forest polished pebbles are recommended for indoor or covered patio use.