Calcite comes in an array of different colors. They all begin in a white milky stage and when they are in contact with other minerals they take on a different color.
Blue Calcite can help improve or develop psychic abilities, as it is associated with the third eye, but also associated with the throat chakra leaving it as a great communication stone. Controlling all kinds of communication, some people have mentioned it helping them in communicating with higher powers, others have mentioned it helping them speak or communicate their truth. Place this stone over either the third eye or throat chakra depending on which kind of communication you would like to benefit.