Duplicate

This spell creates an exact copy of any single item the caster touches. The item to be copied must fit inside a 20-foot cube. The spell has no effect on living creatures, including undead, nor will it copy magical items.

The duplicated item is identical to the original in every way - for instance, a duplicated sword can be wielded to inflict damage as a normal sword - but detect magic can reveal its true nature and Dispel Magic can cause it to disappear. The duplicated object exists for 1 hour/level of the caster, at which time it vanishes; Permanency does not affect duplicated items.

(transcribed from the 2e Wizard's Handbook)