Quest Issue: Burning Rapier

[Catacomb]

After handing Bubar both keys and Gem Case, he pronounces that a gem was inside and hands it to me. It's a Sparkling Sapphire, when it really should have been the Gem of Righteousness.

The Sparkling Sapphire was an earlier component of the quest and it was unfortunate to see it again as the unintended reward.

Any help would be greatly appreciated.