Sigma and XRF Testing
Valuation and Authentication
Before diving into the finer points, you should be familiar with how the Sigma and XRF machines work at a basic level. Use the resources below to get up to speed, then watch the two videos where I cover the details that the other videos left out.
Foundational Resources
Finer Points from Carmine: Niton XRF
19 years of industry experience, distilled into the details that actually matter at the counter.
Finer Points from Carmine: Sigma Metalytics
The nuances behind reading and trusting Sigma results in real-world transactions.