Board Thread:Questions and Answers/@comment-23878562-20130929063526/@comment-5582694-20130930022844

Sorry we have not made that page yet, the main use for gems is to give you a little more money by selling them to venders, the only difference in the decorative gems is what their prices are.

off the top of my head I believe the values are:

Ruby 100gold

Sapphire 400gold

Emerald 1000gold

Hope this helps!