To check if gold is real, look for purity hallmarks (like 14K, 18K, 999), perform a non-magnetic test (real gold won't stick), try the density/float test (real gold sinks fast), and use a scratch test on unglazed ceramic (gold streak means real) or heat/vinegar tests (real gold resists changes), but for certainty, a professional XRF or acid test is best as DIY methods can be misleading for plated items.
You'll only need the piece of jewellery in question and some white vinegar. You can tell if a piece of jewellery is pure gold by placing it on a table or in your palm and pouring white vinegar straight onto the metal. If the metal of the jewellery changes colour, it is not pure gold.
Easy Tests for Authenticating Gold Chains
Sluicing, dredging, river panning, and metal detecting are all great methods for gold prospecting. Be sure to try out each one to see which works best for you. With a little patience and practice, you'll be well on your way to finding gold! Copyright 2022 Detector Electronics Corp.
XRF Testing
X-rays are emitted into a metal via an XRF analyzer, which measures the energy released by the excited electrons to determine the sample's composition. Results from this quick and easy test are provided in seconds, and XRF analyzers are widely regarded as the most reliable tools for metal testing.
The key difference between 22K and 24K gold lies in their purity. 24K gold is 99.9% pure, making it the purest form of gold, while 22K gold contains 91.6% pure gold, with the remaining 8.4% made up of alloy metals like copper or silver for added strength.
Diamagnetic materials: These materials actually repel magnetic fields, which means they are not attracted to magnets. Gold and silver are good examples of diamagnetic materials.
Try the Magnet Test
If it sticks to the magnet, it's not real gold. It likely contains iron or another magnetic metal. If it doesn't react, that's a good sign. However, some fake gold pieces use non-magnetic metals, so this test isn't foolproof.
Brass & Bronze are both primarily made of copper but they are metals that look like gold. These base metals have the highly prized golden tone that is popular in adornment; but, they are made from low-cost metals and frequently used for costume jewelry. Antique jewelry items were often made from bronze.
Common Signs of Fake Jewelry
The float test is a simple way to check if an item is likely real gold. How to Test: Fill a bowl with water and drop the gold piece in. Real gold is dense and will sink to the bottom, while fake gold or gold-plated items may float or hover just below the surface.
Real Gold Always Sinks in Water
Well, not always. While solid gold typically sinks, thin gold pieces or jewelry with a hollow core might float or hover just below the surface. So, while gold has a high density, this test can still be misleading for certain pieces.
Methods to Test If Gold is Real at Home
An adult human body contains approximately 5 liters of blood, which contains different metals such as iron, chromium, and zinc, as well as about 0.2 milligrams of gold [1]!
To perform the test, place your gold item into a small bowl and add a few drops of white vinegar. Pure gold will not react or change color because it's non-reactive. Fake or low-quality gold, however, may turn black or green.
Vinegar Test
If the metal is real gold there will be no change. If the metal is fake gold it will change color.
Real gold doesn't burn or get darker when heat is applied. If the piece of gold is real, the heat will melt the gold which is why gold can be molded and formed into different shapes without losing its color. Other metals like copper, iron, and brass change color and get darker when it is exposed to heat.
Pure gold is very soft and not suitable for everyday wear. It is the most malleable and ductile of all elements, so it is easily bent, scratched, and reshaped. Pure gold does not offer a secure setting for gemstones and is quite heavy, so would be uncomfortable to wear.