The white howlite stone is believed to help teach patience, and overcome self criticism. It is also a very calming stone used to relieve stress of all kinds. It makes an excellent antidote to insomnia due to an overactive mind.
Zodiac - Gemini 
Element - Air
 
Jasper is known as the “supreme nurturer”. It sustains and supports through times of stress, and brings tranquility and wholeness. Jasper provides protection and absorbs negative energy. It balances yin and yang. Jasper clears electromagnetic and environmental pollution, including radiation. It encourages honesty with one's self. Provides courage to assertively tackle problems. Aids quick-thinking and promotes organizational abilities. Jasper stimulates the imagination and transforms ideas into action. Prolongs sexual pleasure. It supports during prolonged illness and re-energizes the body.
Zodiac - Leo, Virgo, Scorpio 
Element - Fire