Look just like river gravels. Natural color won't fade away through time. These stones can be used as decoration for fish tanks, plants, vases or other places. Great for aquarium decoration, making your fish tank shiny and beautiful. Excellent for aquariums, terrariums, flowerpots, glasswares, vases, beach weddings. Features - Color: As shown. - Material: Sandstone. - Package Size: About 30x25x15cm. - The fine grain material does not harm the body of the fish. - The most substrate for benthic fish. - Also very suitable as a decoration for different styles of aquarium landscaping. - Lay the washed bottom sand in the aquarium and shape it as needed. - Applicable occasions: for the fish tank landscape, flowerpot landscape, decoration. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand