Neodymium (Rare Earth) Magnet for preliminary gold testing. Tests all types of jewelry: rings, chains, bracelets, necklaces, etc. This is the strongest magnet available and will make your jewelry testing easier. Neodymium (Rare Earth) magnets have very strong pulling power which makes testing easier. Magnets are used for preliminary testing of jewelry items for plating and ferrous and magnetic materials. Testing with this magnet can be done by hanging it on a string to attract the item being tested towards it.
Features:
Dimensions: 3/4" od x 1/4" id x 1/4" thick
Material: NdFeB, Grade N42
Plating/Coating: Ni-Cu-Ni (Nickel)
Magnetization Direction: Axial (Poles on Flat Ends)
Weight: 0.426 oz. (12.1 g)
Pull Force: 32-33 lbs
Normally used in addition to other testing methods, such as electronic gold testers.