Selenite is a self cleansing stone and is the only material you not only don’t need to cleanse, you can clean and charge others on it too. Selenite is a crystallized form of Gypsum, which is used for good luck and protection. The powerful vibration of Selenite can clear, charge, and activate the Crown and higher chakras.

You want to be careful with contact with other stones because selenite is SUPER soft. 

Hardness: 2.24-2.3
Vibration Number: 8