Rune is one of an ancient modality to do the readings same as tarot , numerology or astrology. there are different crystal runes which can be used for the readings.
The crystal of communication, Lapis is a variety of metamorphic rock formation with Lazurite as main constituent of the formation and having calcite and pyrite deposits. This crystal is considered to be one of the most popular semi precious stone and has been used since time known for various applications including making deep blue color for artwork. Lapis corresponds to the Throat chakra and is effective for opening up the channels for creative expression. Lapis helps in being what you really are and also express what you really need to express. It removes blockages in expression and thus makes one more open not only to express but to also listen and understand. Effective communication can not happen till one is ready and open, a very good crystal for communications.