Prehnite is a pale yellow to green stone made primarily from calcium and aluminium. First recorded in 1788 by Colonel Hendrick von Prehn, who discovered it in Cape Province, South Africa.

Prehnite is believed to possess a protective energy, affording personal and environmental protection whilst strengthening life force and stimulating energy. Its divinatory powers are thought to bridge the gap between the physical and spiritual world, encouraging lucid dreams, seen as the portal to the otherworld.