Sunstone Gem

Sunstone 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
"Sunstone is a feldspar jem, closely related to moonstone, and more properly known as oligoclase. Sunstone can be colorless or faintly greenish and of facet grade, but most common by far is its softer (cabochon) variety. This yields gemstones that have bright red or orange spangles (minute crystals) suspended in a nearly colorless background in a parallel fashion, giving the whole a rich golden or redish brown color."