Selenite and Water
While Selenite and water are not friends, there is a misconception that if you get it wet it will suddenly turn to mush in seconds. This simply is not true! If you spray an Aura Spray from a distance or even place water in a Selenite bowl for a cleansing (and then empty immediately and dry) it will be just fine. Over time water will damage it, if it was soaked it would begin to break down, however there is no need to stress if it comes into contact with a little water.
On a side note if you like to anoint with oil, while not an issue as you use such a tiny amount (a well made ritual oil would need not even a full drop to add its energy) Selenite will stain!