NATURAL LOOK, SMOOTH GRAINS: These 15-20mm stones work well in cactus substrate, drain well, and retain water when mixed with soil. They can also be used to decorate your plants and add a touch of brilliance. These beautiful little rocks are perfect for your faux succulent garden. The crushed stone can be cleaned before first use to maintain its shine. POLISHED PEBBLES: When used as aquarium pebbles, these stones look very attractive in the tank. Your betta fish will love them; you'll often see them playing with and moving the rocks. They also nap in the crevices. The decorative gravel sparkles beautifully in the water under a little light. The crushed stones are suitable for fish, succulents, and other plants, and the natural look of the aquarium stone gives your tank a beautiful decoration. VARIOUS GRAVEL COMBINATIONS: The gravel is similar to Quartz, Rose Quartz, Smoky Quartz, Amethyst, Fluorite, Citrine, and Tiger's Eye Lapis Lazuli. Together, they will be more colorful. Life gives us hope, and gravel is also a good room decoration for you, adding beautiful colors to your space. LOVELY DECORATIVE PEBBLES: The crushed stones can also be used in your art projects. Just like your paintings, your fish decorations and gravel will be more beautiful and dynamic. I believe it's a good art display. Use this gravel in your cactus garden or succulent plants; it will become very beautiful. BRIGHT AND VIBRANT COLORS: Aquarium stone (Amethyst Gravel, 15-20 mm), approximately 500g of gravel can be used in your conversation garden, indoor succulent garden, and even in your own room. It's a beautiful decorative gravel. Shiny Stone Natural Opal Crystal Aquarium Gravel Rocks will be a great decoration for you. Quantity supplied: 1 pack Product color: purple Product specification: 15-20 mm