this crystal is securely placed in a copper structure about 5 ft in height the crystal is about 10" long and is one of 13 in the world. For now I can't remember the exact name and for it's protection I won't say where it is. Apparently Our earth has 'heart meridian" and one of these has been placed on each one. People come here and drop off stones found on the nearby ground. 'our earth is in need of healing and this is what this is for' so someone told me. I am sure if one could be there at the perfect time of day you could catch the sun light coming right through it.