Add Rainbows to Your Life!! This is a 20 mm AUSTRIAN style ball crystal prism. These are called CRYSTAL BALL PENDANTS in the antique trade. The quality is excellent. The sparkle and rainbows these crystals give off are truly breathtaking! They make great suncatchers and are perfect as Christmas tree decorations. These beautiful balls are sure to lend a special atmosphere anywhere they are placed! 20MM is the approximate size of a marble.Adding the colors of the rainbow to your environment expands the colors of your spirit. Colors can help remove blockages and limitations, open the path for a more enriched life, and make you a more balanced and well-rounded person.