[A Must Tool for Photography]If you want to take some amazing pictures, or some basic optical research, or as a gift for kids friends lover etc. this high quality K9 optical crystal photography prism set are highly recommend to you. It can manipulate light through light refraction to form a kaleidoscope-like and rainbows pattern. [High Quality K9 Crystal Prism Set]Each of the RGB optical prism Square is a Square made of made of high quality optically , which is not easy to fade and scratch resistant, thus ensuring maximum use in few years. The K9 crystal prism set inspect by each QC team, make sure free of , distortions, color or inclusions. [Muti-Function Use]The set are believed to clear our mind and absorb sunshine and moonlight too. Can add brightness and harmony to your life space or studio, also can use them for decoration or teaching. Like showing the rainbow and science physics teaching photography crystal equilateral fractal spectrum prism. [Gift Box Packaging]This optical