Ziose Gem

Ziose 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
"Ziose is the name given by sages to a particular facet-grade variety of ziosite; a rare mineral that yields cut stones that flash three vivid hues depending on how the light catches them; purple, blue, and red, or purple, green, and red. Very large (fist- or foot-sized) gems are found and are prized for use in pendants and brooches."