Bornit aka Peacock Rock

Hello Fellow Crystal and Mineral Lovers,

I have a question regarding this stone, when I bought mine it was a blue/green/turquoise. Now the stone has changed colors several times. I would like to know metaphysically why (what it means) and if the definition of the colors are as stand with the chakra aura systems? Is this akin to alchemy? Thank you All!

Love,
Gloria