China Man's Crystall Skull

The crystal skulls are a number of human skull hardstone carvings made of clear or milky quartz rock, known in art history as "rock crystal", claimed to be pre-Columbian Mesoamerican artifacts.The skulls are often claimed to exhibit paranormal phenomena by some members of the New Age movement, and have often been portrayed as such in fiction.[1]

In this photo, Barry Lui of Beijing, China shows his crystal skull.It is an exact replica of the "Skull of Doom", a very time consuming job to produce.

Reference: National Geographic