You're on the right track man!
That wood is really beautiful!

The glass needs something.
It seems more like the scewne inside is being seen through
a magnifying glass rather than some actually INSIDE a
glass globe.
Are you using a two sided peice of glass? I'm just trying to put my finger on the reason it looks that way.

also you might want to use two objects, one for glass, one for water, each with their own index of refraction.

water is ( i think )1.3 and glass is like 1.2 or something.

Just my opinion. ( and it really is pretty )

Indogo 2000