The weight ：1.6LB of Natural River Stones,<br> Color:White.Average <br> Size : (6-9 mm),<br> Use for Potted Plants, Succulents, Flower arrangements, Vase fillers, Aquariums. <br> Caution:Before you add the rock into the aquarium vase or planter, please ensure that you wash them well to get rid of any surface chemicals, bacteria, fungus, algae and parasites that may be present.Soak them in boiled water (don't boil rocks), brush and rinse well, or soak in a bleach/water solution, let it dry before use.