Andar Gem

Andar Gems are valuable gems in the game which may be found. This item appears in Baldur's Gate (game), Baldur's Gate: Enhanced Edition, Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

In-game description
"Andar is hard and durable, yielding translucent gems ("Andars") that flash green-red or brown-red when properly faceted."