Another mayan mask

Can you guess what the theme might be this time?  If you guessed skulls, then you've clearly been following this blog.  Here's the concept sketch:
It's based on this actual mayan mask which is half skull, half mummified face. 
Picture courtesy of
The crown on top is based on these mayan stone heads from the Merida museum in Yucatan.  My faux jade effect worked out pretty well, so I'll be using that again for the crown.
Picture courtesy of