For your consideration are these Smoky Quartz crystal spheres, sold by the piece. These are all super gemmy and guaranteed to have intense internal rainbows. They measures approximately 22-24mmm in diameter.
Smoky Quartz is a stone of Protection. It protects against negative energies, aids in communication, heals emotional trauma and depression. Helps one to live in the present moment. Good for organizational skills, it clears up miscommunication, opens up the paths of perception. Can assist in overcoming grief and despair, allowing healing, reconciliation and a sense of joy. Allows one to trust the Universe.
Chakra: Root