To the casual observer, this necklace seems to be nothing but a gaudy string of junk jewels of the cheapest sort of imitation.
However, to the person wearing it, it contains globes of enormous power, which the wearer, and only the wearer, can detach at will and hurl up to 70 feet. When they arrive at the end of their trajectory they burst as a magical fireball.
There are 3 sizes of Fireball with varying degrees of destructive power.