7 ms·

yeah, this machine seems to be able to do it: http://www.ebay.ca/itm/GoldXpert-SDD-Portable-Countertop-XRF-Analyser-/201085598918 http://www.ebay.ca/itm/GoldXpe

• jamessb 12y ago
  The first sentence of the original article states that XRF won't tell you if the core of the bar has been replaced with a different metal: "You don’t need to be a conspiracy theorist to find this worrying: a 1kg gold bar, certified as 99.98% pure by XRF (X-ray fluorescence) tests, turns out to have been drilled out and largely replaced with tungsten" The article also says that a micro-ohm meter can detect such replacement.