The amulet of accuracy is an item obtained from Wizard Mizgog by completing the Imp Catcher quest. This amulet is usually worn by newer players as it is relatively easy to obtain. It gives decent attack bonuses, making it a cheap alternative to stronger amulets such as the amulet of power or glory.
The amulet of accuracy can only be obtained once per account. If a player loses their amulet, Wizard Mizgog will not give them another. The only way to obtain a new one is to trade with another player.