Prehnite Healing Properties - Prehnite is a new and exciting entry into the field of crystology.Prehnite is a stone of unconditional love. It is said to connect to the archangel Raphael. Prehnite enhances inner knowledge, showing tje path forward to spiritual growth through attunement to divine energy. The Gemstone Prehnite. Prehnite gemstones are usually light green in color, with a whitish hue or yellowish tinge. Deep green gemstones are not common. Prehnite gemstones often appear cloudy or velvety, and rarely fully transparent.Prehnite is a pale yellow-green stone made primarily of calcium and aluminum.