i like these, they're all consistent, interesting designs.
just a few nitpicks
should the light hitting the center prong on the rooks end before hitting the crown shape?
king's and queen's crowns seem flat, maybe you should darken up the right side
have you considered a final specular color to enhance volume?
things i'd like to know
are you coding this or using a prebuilt engine, or have you got some assitance
how detailed are the board tiles going to be
do you have the option to change the names of the sides? 'white' and 'black' don't seem to fit with the neato bronze and blue