mediumwhat am-i

Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks. What am I?
Common Wrong Answers
“Air”
Although air is light and can caress the sky, it does not soothe the skin or crack rocks.
“Soap”
Soap can soothe the skin but does not have the properties of being light enough to caress the sky or hard enough to crack rocks.
“Ice”
Ice is hard enough to crack rocks, but it does not soothe the skin in the same way water does and does not float in the sky.