A picture of the two can be found here.

I'm not sure what to do with them, I've tried a few things.

I've tried putting each crystal in the four open crates at the back, I've tired giving the rock dude the crystals, I've tried putting them all in the fire and water. I can't seem to find anything. Anyone else got anything?

EDIT: I didn't find him there! He was behind a tree to the left of the house. I found that running into his legs sometimes caused him to jump up so I pushed him to the middle to see if it did anything. It didn't.

i tried making a sword... it didnt work

WOW I JUST SEARCHED THIS AND THEN FIGERED IT OUT PUT YOUR FACE IN THEM!

oops caps :)

wat do we do

just put it in your face

where in the fire and what fire0

think its a mystical bizz. try to place them on the mirror

Can you guys post where the fire crystal is?

it's at the back of the house behind the doo

I'm starting to think maybe it's part of something that hasn't been completed yet. Hopefully in future updates we'll see more to this crystal mystery. :P

EDIT: Just saw in another post that it's been confirmed by developer that the crystals have no purpose yet but will in the future. :D