Jasper Gem

Jasper Gems are valuable gems in the game which may be found. 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
"Jasper is an opaque quartz found in reds, browns, and blacks. Very rare specimens are blue or have bands of blue against the other colours. Jasper can be crushed and used in making potions and magical devices which protect against poison."