Apophyllite.
The clusters come in assorted shapes, sizes, formations, colors, and inclusions. No two pieces are the same.
 
A high vibrational stone that bridges the spiritual and physical worlds. Communication with spirit guides is assisted with this stone, making it perfect for expanding one's own consciousness. A helpful tool for astral projection and lucid dreaming. Although typically clear, Apophyllite may come in many colors including the rarest of all - Green Apophyllite which is especially powerful when working with nature. This crystal will bring enlightenment, inspiration and in alignment with your higher self.
 
Medium - approx 5-6cm wide and 3cm long.
Large - approx 8-10cm wide and 4/4.5cm long.