True Weight Gloves

This set of emerald green gloves are made from velvet with very fine silk stitching and function as a small scale. While wearing them, you can hold two objects in your hands and know the exact weight of the objects. The objects must be of a size and weight that allow you to hold your arms straight out with one in each open palm. While using the gloves to weigh objects, you can speak a command word that makes them disappear in a puff of green smoke if either object is counterfeit.

Source: Level Up Advanced 5e · OGL-1.0a · 5.1