Each raw crystal piece is unique in shape, size, pattern and will have natural dents/marks.
Blue Calcite is a calming crystal that soothes and protects the spiritual self. Like all calcite it protects and enhances psychic abilities, whilst it doesn’t block energy, it surrounds your aura with a cleansing shield, protecting you from taking on more external energy than you should. 
Blue Calcite is connected to the throat chakra, it aids in achieving clear communication and clearing up outside noise to find balance within your own thoughts and emotions. 
Due to its ability to improve communication, It is also used to enhance psychic abilities and connect to higher dimensions. Place this angelic crystal in your home or work area to attract honest and clear communication.