Black Jasper (The Guardian) is known as the gemstone of protection, promoting confidence, courage and is sometimes worn as a “worry stone”. Howlite stills the mind and is excellent for sleep and meditation. It helps to ensure calm and reasoned communication. Howlite stills the mind and is excellent for sleep and meditation. It helps to ensure calm and reasoned communication. Howlite strengthens the memory and instils a need for knowledge. It can calm turbulent emotions, absorb stress, tension and anxiety. Howlite is helpful for cooling heated emotions and regaining emotional balance.