Bests & Worsts Reviews from Amazon

I am one of the head guys at a mining corporation. We have an XRF, which tells exactly what is in anything you read. I ordered a 64 gram bar last December. I recently ran it through the XRF n found this to be 56% copper and 36% zinc. NO GOLD!!!!! Less then 1% silver. A few common metals. Basically I paid $25 for a $0.50 chunk of metal.