Network transmission China 4 into bullion adulteration saying though is exaggerated, but that does not mean that there is no bullion adulteration phenomenon.

"Among doped iridium or tungsten bullion something did happen, the main reason is the density of the two metals and gold is very close and easy to 'hide' to bullion being without being noticed." Bank of Communications Beijing Branch personal Finance Ministry researcher Zhao Jiong said, because the gold density, weight has always been an important indicator of gold purity testing, and "weigh gold" is also a basic assessment of the young clerk, and the actual amount requested does not exceed 10%. Therefore, the incorporation of iridium or tungsten is to muddle through "weight off."

Adulteration behind profits, is the reason criminals dare to take risks. Zhao Jiong said tungsten, for example, the metal's price is only one-third of the gold. If a 100 grams of gold bullion, gold with 60%, with 40% of the tungsten core, that the cost price is equivalent to less than 70% pure gold, spreads very large.

Since the existence of such fraud phenomenon, then there is no way ordinary consumers identify themselves adulteration of gold bullion it?

"Unfortunately, in the absence of professional testing tools and rich experience in the identification of the premise, the average consumer is almost impossible to distinguish between true adulterated gold bars and gold bullion." Zhao Jiong bluntly, if counterfeiters means superb, deep in the bars of tungsten Internally, even with the general detector are difficult to identify true and false. "After all, gold bullion detector only detects the surface, in order to fully identify only completely Rongjin before differentiate genuine."

In this regard, industry experts advice given are when consumers buy gold bullion should choose informal channels, so as to maximize the risk-averse.