Howlite has a lovely soothing energy that will help to alleviate stress, and may help to calm fits of anger and bad temper.
It has extremely useful metaphysical properties that will aid you to deal with belligerent or aggressive people. Their energy may calm both you and the other person.
It can also heighten the level of patience you are feeling about what is happening. For anyone having sleeping difficulties, place a piece under your pillow as it is known to alleviate insomnia.