"Rainbow" Crystal soil is a kind of polymer which is able to repeatly absorb and store water and nutrients needed for plants and then release _disibledevent= "urn:schemas-microsoft-com:office:smarttags" />Pearl and irregular-Rainbow Ice. And there are 12 colors available: red, pink, orange, whiskey, yellow, purple, blue, dark green, light green, clear, black and white. It is well sale product in Australia, Greece, UK, Brazil, Japan and HK, etc.