Yes, I think the geo's onsite will have assessed the core both by eye and run a handheld XRF (like a Niton) over it.
That's a very good sign.
Here's a summary from AI -"Yes, silver levels can be detected well using handheld XRF analyzers. These analyzers are specifically designed to identify and quantify precious metals like silver, gold, and platinum. They are a non-destructive method for analyzing the composition of materials and can be used in various applications, including jewelry analysis, cultural heritage studies, and even environmental monitoring."
it was a new technology a decade ago. Now it's all automated as well. XRF has been around for decades, it was the sample prep. that took time.
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