Aquarium Rock Assortment SM Aquarium Safe, All Natural Stone Iwagumi Aquascape, Cichlid Aquarium, Terrarium Plan and Design Your Own Aquascape Assorted Ornamental Aquarium-safe Stones: Small Pieces of Various Types Picture #5 shows stone both wet and dry as water enhances the stone colors. Organic, Natural Stone! No Plastic! No Resin! Approximately 1.5 Pounds Assorted Small pieces.