I'm suspicious of tungsten gold bar stories. This story on fake bars in Vietnam confirms my suspicion.
It say that reports of fake bars caused a 50% drop in gold turnover, which reduced fiat inflation as it reduced the use of, and holding of, gold as money. As the story notes, previously "government agencies had to apply a lot of measures to stabilize the market. The State Bank of Vietnam had strenuously resisted with the criticism from the public when it was compiling the government decree [ie restrictions] on bullion gold trade."
Convenient. Remember this play book when you start to see stories about fake bars coinciding with high inflation/mass interest in precious metals.