1. Observation appearance: True 5D hard gold usually has a bright and uniform golden yellow color, while counterfeit 5D hard gold may have uneven or dark color (compared with pure gold).
2. Study trademarks and logos: Royal 5D hard gold manufacturers usually mark trademarks and related logos on their products. You can study it carefully and compare it with the products on the official authorized sales channel to ensure consistency.
3. Check the engraving: the real 5D hard gold pass often has corresponding engraving marks. You need to pay attention to check whether the carving on the gold ornaments is clear, regular and accurate, and whether it is consistent with the information provided by the manufacturer.
4. Use a scale: The density of real 5D hard gold is higher, so the same volume of 5D hard gold is heavier than fake gold. You can weigh it with a scale and compare the weight difference between genuine products and suspected counterfeit products.
5. Seek professional testing: If you are still not sure of its authenticity, you can seek the help of a professional jewelry appraisal agency or jewelry store. They can use professional equipment and technology to detect the composition and authenticity of gold ornaments.
It should be noted that the above methods are only preliminary methods for judging authenticity. If you continue to doubt or need conclusive results, it is best to seek professional appraisal services. At the same time, we should buy jewelry from formal channels to ensure the quality and authenticity of products.