When evaluating a handheld mineral analyzer (typically XRF - X-ray Fluorescence or LIBS - Laser Induced Breakdown Spectroscopy), you must prioritize the Detector Type. For high-precision mining and exploration, a Silicon Drift Detector (SDD) is superior to a PiN diode as it offers faster counting rates and better resolution for light elements like Mg, Al, and Si. Additionally, verify the Excitation Source (typically a 4W-50kV X-ray tube) and ensure the device features built-in GPS and Bluetooth for real-time field mapping and data synchronization.