Prehnite is a pale green mineral that has many meanings, including:
Unconditional love
Prehnite is said to be the stone of unconditional love, and to connect the heart and will. 
 
Spiritual communication
Prehnite is believed to help with spiritual communication through visualization and meditation. 
 
Dreaming
Prehnite is known as the "stone of dreaming", and is thought to increase the power of dreams, strengthen lucid dreaming, and help communicate with other planes of existence. 
 
Luck
In astrology, prehnite is considered a lucky stone for Libra, Scorpio, and Capricorn. 
 
Affordable alternative to chrysolite
Prehnite is sometimes called the "chrysolite of sage", and can be an affordable alternative to chrysolite, which is the birthstone for August. 
 
Prehnite store healing properties
Prehnite is a basic calcium aluminum silicate with a hardness of 6–6.5 and a specific gravity of 2.80–2.95. It's found in veins and cavities of basaltic rocks, and is sometimes found in granites, syenites, or gneisses