【Natural Polished Gravel】:These Amethyst Stones are polished so they are natural and suitable for a variety of purposes.Crystals Stone has high hardness, and which have subtle shine when the sunlight hits their polished surface. 【Size】:Natural Mutilcolor Crystal Pebbles are available in a wide range of sizes, ranging from 3-5mm,5-7mm,7-9mm,9-12mm. 【DIY Craft Projects】：Unleash your creativity with these assorted crystals. Use them for crafting wish bottles, air plant terrariums, and unique jewelry. 【Fluorite For Plants】:Mutilcolor Fluorite are wonderful when used as decorative accents on the top of the soil in garden pots,It is very convenient that using Fluorite on bare soil can create a clean and fresh finish to your container garden pots. 【Aquarium Gravel Crystal Pebbles】:Aquarium gravel makes a tank more attractive. Aquarium Crystal Pebbles is the most common aquarium substrates over all kinds of fish tank stones and sand. This is not only for decorating your fish tank, but there are sundry filter properties in gravels, that help filtrate your aquarium.