Selenite is a crystallized form of Gypsum, which is used for good luck and protection. The powerful vibration of Selenite can clear, open, and activate the Crown and Higher Chakras and is excellent for all types of spiritual work. Selenite can also be used to strengthen the memory. Selenite is a calming stone that instils deep peace and is excellent for meditation or spiritual work. It assists judgement and insight. It clears confusion and aids in seeing the deeper picture. Selenite aligns the spinal column and promotes flexibility. Great for charging your other crystals. 
145mm x 20mm across the base. 
As these are hand carved they will all differ slightly. 
All measurements are approximate