Where and how you use Rare items(monster gems & Orbs)?

[autumnsnow]

Its always excited when you see the monster that you just killed drop a rare item, but what do you do with those monster gems(that is not related to your character class) and orbs after the excitement?

Here is what I have got, so far… but no idea where to use them…
(yesterday used one of my blue orb for fun )

oh! Btw, If you are interested with my gems, offers are welcome

[scarethemonkeys]

I use the Orbs on Bot Spots. Good times to be had by all.

[autumnsnow]

but only red orbs, right? I tried with blue orb, doesnt seems to attack others, but monsters.