When buying gold, it's essential to verify its purity. While professional testing is recommended, you can perform some simple tests at home to get a rough idea. This article covers several methods to check gold purity at home.
Look for the hallmark stamp on the gold item. In Pakistan, hallmarks indicate the karat (24K, 22K, etc.) and sometimes the manufacturer's mark. While this is not a foolproof test, it's a good starting point.
Gold is not magnetic. Hold a strong magnet near the gold. If it sticks, the item contains other metals and is not pure gold. This test is not definitive because some alloys are non-magnetic, but it can rule out obvious fakes.
Weigh the gold item and then submerge it in water to measure displacement. The density of pure gold is 19.32 g/cm³. Calculate the density and compare. This method requires careful measurement.
Using a gold testing kit with nitric acid, apply a small drop to the gold. The reaction (color change) indicates the purity. This test requires caution as acid can damage the item.
Scratch the gold on an unglazed ceramic plate. If it leaves a gold streak, it's likely genuine; if it's black, it's fake.
Home tests can give you a general indication of purity, but for accurate results, always consult a certified jeweler or use professional testing equipment.