Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Help/Tips/Tricks Teneberium Items Trouble

Is there something that causes some items to disappear when trading them?
We have just killed the two demons in the Immaculate relic storage area and one of them drops a Teneberium weapon. When trying to trade it between characters it vanished. We reloaded the game and it happened again. I also noticed a orange necklace that had +1 Teneberium on it has vanished as well.
Anyone have any experience with this?
Is it because we have not completed the Troll King Quest yet?
Where do you find the scroll to open his gate? (I know where to read it, just can't find the scroll)
Thanks

Try checking that bloodstone chest you got from whatshisname. The game might have stored your tenebrium stuff in there.

This is not a scroll - this is a book. You can find the book in Fredrick's Blood Stone Quest. You can find Fredrick in this "windy" place in Luculla Forest area.

The book's name is

Thanks for the help guys.