As I had no idea about XRF v Assays so I did some research and found this on Google.
'As a rule of thumb the accuracy “out of the box” given by the difference between XRF value and assay can be as good as 0.2 to 0.5% for gold in jewelry, whereas the accuracy out of the box for minerals can be within 20% of the lab assay or even more if the sample is not homogeneous enough.'
It seems that XRF if only good for gold jewelry, and can only be used as an indicator for minerals.
GED Price at posting:
1.1¢ Sentiment: Hold Disclosure: Held
