Variegated layers of purple hues and some green layers snuck in there too with a very pyramid look at the top makes this pillar most interesting in busy layers of color and healed fissures. Perhaps that latter is why it is popular with healers.
There is a myth that when Noah's flood retreated on Atlantis and through out the world, the rainbows of the earth withdrew into fluorite in order that they might remain on earth. In China, fluorite was worn for luck and protection against black magic and to prevent thoughts of suicide.
They're all similar; we'll pick out the best one for you.
