The crown chakra is located at the top of one's head. It is the gateway center that connects us to divine wisdom and clarity. 
Amethyst is said to be a master healer crystal that emits a peaceful vibration. It promotes a connection to divine guidance and protects one against psychic debris by transmuting this energy into unconditional love.
It is beneficial for those struggling with negative thought patterns as it promotes calm and clarity.
Clear Quartz is a powerful crystal that enhances, energizes, and supports the properties of other crystals.
It is pure and is said to be a universal crystal that promotes balance, focus, and connection.