Chrysoberyl Gem

Chrysoberyl Gem is an uncommon gem with a decent value. It can only be sold to shops. This item appears in Baldur's Gate, Baldur's Gate: Enhanced Edition, Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

In-game description
"Chrysoberyl is a hard, transparent, green gem which is usually facet- cut. It is said that Chrysoberyl has ties to the outer planes and hence its use with battling demonic possession and the undead."