How can you recognise real gold?

Real gold has unique properties that allow us to distinguish it from imitations and other metals. If you want to invest in gold, or if you want to verify the authenticity of gold, there are several ways that can be applied to recognise real gold. We take you through the most important techniques for verifying the authenticity of gold. 
 

Colour and shine of real gold

 
Real gold has a distinctive colour and shine that are difficult to imitate. Pure gold (24-carat) has a warm, rich yellow colour. Lower-carat gold, such as 18K or 14K, can vary in shades of yellow depending on the alloying elements, such as silver and copper, that have been added. Imitations, such as gold-plated metal or gold-coloured alloys, often have a duller or more orangey hue and lack the depth and luster of real gold. It is important to note that real gold will not fade or discolour, which can be a good indication of authenticity.
 

The magnet test

 
A simple way to check the authenticity of gold is to use a magnet. Gold is not magnetic so a genuine gold item will not respond to a magnet. If the metal does get attracted to the magnet, it is not pure gold and may be a gold-plated product or another metal alloy. This test is not definitive. After all, some non-gold materials are also not magnetic. However, this test can help to quickly identify an imitation. 
 

Recognising gold by hallmarks

 
Real gold usually comes with hallmarks indicating its purity and origin. Hallmarks indicate the carat or purity, such as 24K, 18K or 14K, and may also include the manufacturer's name or logo. In addition, a hallmark may consist of a number indicating the gold content in thousandths, such as 750 which stands for 75% pure gold or 999.9 which equals 99.99% pure gold. Checking these stamps can be a quick way to confirm the authenticity of gold.
 

The density of gold

 
Gold has a high density of about 19.3 grams per cubic centimetre. This property can be used to distinguish real gold from imitations. To test the density of a gold piece, you can use the water displacement method. This involves measuring the weight of the gold piece in air and then in water. By calculating the difference in weight and applying the correct formula, you can determine the density. If the density matches that of gold, chances are the object is real.
 

Professional evaluation

For a final assessment of the authenticity of gold, it is advisable to have a professional evaluation carried out. A commonly used method is spectroscopy, which analyses the light absorption of the material to determine its purity and composition. 
In addition, experts can also use X-ray fluorescence spectrometry (XRF) to test the gold. In doubt about the authenticity of gold? Then always opt for certainty by having a professional evaluation carried out.