I have some gemstones on a weapon, and I'm trying to make them look nice ingame.

They look "okay" right now: http://i.imgur.com/tBJNE.jpg

But I would really like them to look better than that. If anyone knows how to go about making these look really nice in game. Can you give me a holler? I'm kind of at my wits end.

oooh they do!
how about a glow map, that makes it more shiny?

are you applying a cubemap? that will give it a much more lustre-like look (will have a simulated reflection-like parallaxing effect)

Yeah I have on the opal cubemap for this.