Blue John is fluorite from the Blue John cavern in Derbyshire England. It comes in striped colors of mainly purple-red, dark blue, and yellow. The name supposedly comes from what the French miners of the past called it “bleu-jaune” meaning blue-yellow. It’s reputedly the most expensive and prized fluorite in the world.
Metaphysically, Blue John has the properties of fluorite in general. It is said to bring renewal and energy, as well as strength, health and well-being. Blue John is said to be a catalyst for personal growth, encouraging experimenting, exploring, and understanding. It is a strong teaching and learning stone because of this. Blue John is primarily related to the third eye and crown chakras with the solar plexus chakra tied in.