one may use BB's shader on that:

http://www.renderosity.com/mod/forumpro/?thread_id=2879047&page_number=2#msg4141519

if it's glass or acrylic, it wouldn't have as much dispersion as diamond, hence you could fake it with reflection of off-screen items.  

also, if one's boss were to be awarded one of those, I hope no mischievous prankster would put it on his chair when he wasn't looking