Green Aventurine SM Aquarium Safe All Natural Stone, Metaphyscial Healing, Chakra Stones Plan and Design Your Own Aquascape Ornamental Aquarium-safe Stones: Small Pieces of Aventurine .75 to 1.5 inches in size. Metaphysically, Aventurine is a stone of good fortune and chance. Green Aventurine is believed to promote vitality, growth and confidence. Organic, Natural Stone! No Plastic! No Resin! Approximately 1 Pound Assorted Small pieces; Rough Pieces, As Pictured; NOT Tumbled.