Dashington 5 Pounds-flat Amber Colored, Glass Marbles for Vase Filler, Table Scatter, Aquarium Decor Dashington High Quality Decorative Smooth Glass Marbles Perfect for aquarium use! Use this item in vases for filler! Looks great spread around centerpiece! Size is approximately 3/4" 5 pound bag contains approximately 400-500 marbles. Gems will have a shiny glass like finish