Antico e Gioielli Tester Calamita Portachiavi Test Ottone, Oro, Argento KM02 6 libbre

If a magnet responds to jewelry, it is not fine silver or anything near pure gold. Carry it everywhere! Now with a 60% stronger magnet than our previous version. The aluminum casing protects the magnet from chipping and breaking, common with unmounted rare earth magnets, and a vinyl cap is provided for when the magnet is not in use.

eBay