Selenite
Selenite is a stone of mental clarity, enhancing the minds flexibility, strengthening decision making, and helping to clear up mental confusion. Helps dissipate any feelings of inadequacy, jealousy, doubt, fear and negativity. Selenite also has the ability to clear and amplify other stones that are placed on or near it. Offers Divine protection and guidance.
Chakras: third eye, sacral 
Zodiac: Cancer