The Rainbow Fluorite or multicolour Fluorite shows different colours in one stone and is mined in areas all over the world. Each different fluorite colour has a slightly different fluorite meaning because the various colours are determined by different elements included in the fluorite mineral rock. Each different element brings its own particular attributes, adding them to the basic fluorite meaning. Fluorite crystals are not traditional birthstones. Green fluorite, however, is a natural fluorite birthstone for people born in the spring between April 20 and May 20. Blue fluorite is a natural fluorite birthstone for people born from February 19 to March 19, under the Zodiac sign Pisces. Green fluorite is excellent for the heart chakra while blue fluorite works well at the throat chakra.