The Scroll of Fireball is a Common Scroll found in Baldur's Gate 3.
Scrolls are items that allow you a free cast of the Spell contained within. They can also be used by Wizards to learn the Spell in question. This consumes the Scroll.
The Scroll of Fireball allows you a free cast of the 
Scroll of Fireball Spell.
Where to Get the Scroll of Fireball in Baldur's Gate 3
The Scroll of Fireball can be acquired through purchase from traders or by seizing them from a variety of containers and enemies.
