Monster dropped gems

Hello,

I have quickly read the gems ideas thread, however I haven't found the following idea about gems, it might've actually been mentioned somewhere else, but here it is anyway:

We have trophies drops, we have items drops from monsters. Is it possible to implement gems being dropped from monster kills as well ? And thus implement some of the ideas mentioned in that thread (some ideas are great).

Otherwise casters pretty much know everything about their future ! They know exactly what gems are being sold in towns, what skills they need, character progression is pretty much laid out and set.. a bit dull ?

We all know what item drops we're going to be getting.

However

Why aren't gems treated the same as items?