How much do Ma and Pa Kent know about the stones?

[MayaQT]

Someone please correct me if I'm wrong but I've never seen Clark discuss the stones with his parents. How much do they know? When Clark came back from China he totally avoided the subject and then he ignored the issue of finding the stones until the season finale. So... how much do they know? This was what was going through my head when Jason was holding the Kents hostage... Even when Clark left to get the stones right before the meteor shower began, he didn't mention the them either! And Johnathon just let him go... with no explanation... I mean, they trust him but this was one situation where they knew there was a possibility that Clark was not invincible (i.e kryptonite possibly with the meteor shower). That is one big part of your life to leave out and not tell your parents...

Anyway, can anyone remind of some scenes or are there any of Clark talking about the stones with his parents?

[M.D.]

Clark fessed up about the stones in one of the eps.

[Superdan13]

Yer and they know that Swan sent him a stone, the one he put in the cave

[ckfan]

He definitely told them that he put the fire stone in the cave chamber in one of the episodes - maybe Sacred?

And I think they know about the water stone because of what happened in Transference, but they probably didn't know anything about where it was located.

[montevallo]

he probably told them between episoids
we never see him tell his parents about his weakness to kryptonite but they know later

[fa8362]

"Yer and they know that Swan sent him a stone, the one he put in the cave"

Swan didn't send him that stone. Kal-el stole that stone from Lex's plane in the season 4 opener.