I recently started to finish up a whole bunch of sidequests and some minor things i did not do yet. So i finished the Thieves Guild, and afterward started the quest "No Stone Unturned" which ended up being a real pain in my behind.

I've managed to get 23/24, but i was unable to find the one in "Stony Creek Cave". After digging up some memories i remembered that i found that one already. I found it in the beginning (after you killed your first dragon - and explore-fever struck me). Back then it was still an "Unusual Gem"... And i sold it :S

I sold it to the guy in the general store (Belethor's General Goods) in Whiterun. But since it was such a long time ago, he doesn't seem to have it anymore.

+ i play on an xbox 360, so there are no nice console commands to help me out ;P

Anyone know how to 'fix' this or if those Gems respawn?

Thank you for your time

Man i don't think they respawn Maybe he'll have it for sale again?

I didn't think the game would let you sell them. Maybe I'm wrong.

You can't sell quest items, you must've missed one of them,

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try looking in the darkbrotherhood if you haven't already (Falkreath's sanctuary)
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I didn't think you could sell them...

I sold it before it turned into a quest item, it was still an "Unusual Gem" at the time :S

[+spoiler+] stuff you want to hide [+/+spoiler+]

Just remove the + signs.

On topic: Check everywhere else first, unusual gems are quest items and wont even show up when you're bartering. You probably just sold some other gem to Belathor.

Once its in your inventory the quest starts so you couldn't of sold it.

You can't sell or drop them. Try rechecking every place. I just recently fixed my glitch of getting locked out of the quest by having all 24 before talking to Vex. You can fix that my using the platter glitch to run through some walls.

Maybe i misplaced it somewhere ;S if only there was a questmarker on it so i can find it faster

You can't drop them either.

This is no more possible than selling them. One of the reasons I hate the things.