Extra-Large 28mm N52 Keychain Magnet Tester for Gold, Silver, Jewelry, & Scrap Metal

This extra-large 28mm (1.1 inch) diameter keychain magnet keychain magnet offers extra-strong neodymium magnet power in a handy keychain. They are perfect for jewelers, recyclers, coin dealers, or anyone that needs a convenient, easy-to-carry magnet to test for iron, nickel, or cobalt content. Featuring a durable N52 neodymium magnet housed in a plated metal shell, it has a pull force of over 16 pounds (71 Newtons).  Determine if jewelry is silver or gold plated by testing if ferrous metals are used as the base metal (excluding some nickel alloys). If a magnet responds to jewelry, it is not fine silver or anything near pure gold. The same is also true of brass and bronze antiques, many are just brass plating over steel or iron. This strong magnet can also be used to determine polished aluminum from stainless steel in most cases, and is very handy for testing industrial metals for recycling.  The keychain magnet features a powerful 28mm N52 grade (16 lbs/71 Newtons minimum pull strength