The historic Perth Mint is facing a potential $9 billion recall of gold bars after selling diluted or "doped" bullion to China and then covering it up, according to a leaked internal report.
Four Corners has uncovered documents charting the WA government-owned mint's decision to begin "doping" its gold in 2018, and then how it withheld evidence from its largest client in an effort to protect its reputation.
WA Premier Mark McGowan had ministerial responsibility for the mint for four years until March 2021.
Gold doping is a somewhat accepted practice in the industry and is not illegal, but is high risk for refiners, as it lowers the quality of bullion by adding impurities like silver or copper.
Trace amounts of these metals are permitted, but Perth Mint's plan – to keep just within industry standard of 99.99 per cent purity – only left a miniscule margin of error.
The mint began doping its gold as a cost-saving measure in 2018, expecting to save up to $620,000 a year — a tiny fraction of its annual sales.
Just months after the doping began, the report says refinery staff identified concerns that silver and copper levels may have exceeded those allowed by the SGE.
Despite this, refinery staff continued doping the gold.
When Perth Mint went back and checked the two gold bars at the centre of the customer complaint it found one had been "red flagged" by its refinery.
Crucially, the mint did not share this information with its largest client.
On the day the failed assay was discovered, the mint immediately ceased its gold doping program
Here is the full article
https://www.abc.net.au/news/2023-03-06/perth-mint-gold-doping-china-cover-up-four-corners/102048622