if you zoom in, its really cool, but at 100% its almost unreadable. I would suggest making it more transparent, and playing with the reflections/lighting of the backside too...

That aside, its still really cool.

A face?XD

Thanks for the feedback guys!

I intend to get better... no matter how much of a noob i must look on this site! ^D^

Should have more gleams if it's a gemstone, lineart is ok though.

I can see a face inside! :D

yea, hmm show  abit more light in the center.

A little dark... try to add some light alaso on the edges of the gemstone... that would make the image more readable...