【Weight ＆ Size】Black pebbles total weight: 5 pounds, size is about 3/8 inch. All gravels are natural, slight variations in manual measurements may occur. black rocks color are matte black and really complements plants. They add a nice touch of elegance to your arrangements 【Black Stones for Plants】Small black stones are polished without sharp edges and will not harm your succulents or potted cactus. Covering the soil with a layer of black gravels will not only make your succulents stand out, but also keep the soil moisture and help plants grow better 【Multiple Uses】Common applications of black rocks include floral arrangements, bowls, terrariums, glass hurricane candle holders, air plant potted, bamboo plants, aquariums, succulents, cactus, fountains, sidewalk pavement and DIY for crafts. You don't have to spend too much money to decorate. FANTIAN natural polished black river rocks can meet your needs 【Black Gravel】FANTIAN black pea gravels are natural with no added fillers, dyes. Only natural rocks and pure paraffin. The color won't fade away through time and it is completely safe to use around pets and children. They are very clean and have no dust or powder attached 【Precautions】Please wash the surface with hot soapy water for 5 minutes before putting it in the aquarium, and then wash it with clean water. If you have any questions, you can contact us at any time, and we will do our best to solve your problems In the process of hundreds of millions of years of evolution, the pebbles have withstood the motion of waves, and the collision and friction of the gravel finally reached your hand. It is natural and non-toxic. Different shapes, patterns and colors make the pebbles unique. This is Artwork of nature