GemStones® Decorative Aquarium Stones are the perfect addition to your aquarium! Made of 100% glass, these translucent stones will brighten your aquarium with sparkling colors. Available in several styles & colors to match any aquarium, these solid glass stones refract light creating a sea of color and bringing your aquarium decor to life. GemStones® allow you to anchor your plants and other aquarium decor items, and make the perfect base for your aquarium. Gemstones® are safe for your aquatic pets and the smooth glass surface makes them easy to clean. Each bag comes with approximately 90 GemStones®, and you can mix & match colors & designs to match your aquarium and home decor. Also great for adding a colorful base to your planters, vases, bowls and other decorative home items.