TBC Decorative Gems: Beautiful Assorted Mixed Color Gem Stones. 100% Glass Flat Stones. Beautiful Vase Fillers, Use in Floral Arrangements, Aquariums, Wet or Dry. Great for Eye Catching Centerpiece, Also Great with LED Lights. 16 Oz Bag. 16mm-18mm Flat Stones GEM STONES ASSORTED MIXED COLORS 100% GLASS