TOMRA ’ s sensor-based ore sorting solutions deliver proven improvements in recovery and profitability in a wide variety of mining operations , including tin , gold , lithium , diamonds , quartz , chromite , tungsten and phosphate . They maximize efficiency , precision and speed , capturing even the smallest particle sizes with technologies that include Color , Near-Infrared ( NIR ), X-Ray Transmission ( XRT ), Electromagnetic and Laser sensors . Energy-efficient , cost-effective , green mining .