Worry stones are smooth, polished gemstones, usually in the shape of an oval with a thumb-sized indentation, used for relaxation or anxiety relief. ... They are used by holding the stone between the index finger and thumb and gently moving one's thumb back and forth across the stone.
Selenite is a crystallized form of Gypsum, which is used for good luck and protection. The powerful vibration of Selenite can clear, open, and activate the Crown and Higher Chakras and is excellent for all types of spiritual work. Selenite can also be used to strengthen the memory.