New Refining Processes: How Tech Is Improving Purity and Yield Laser-based refining Gold in its pure form and other valuable metals are left behind when base metals in the ore are vaporized using laser-based devices. Compared to conventional smelting, this…
- GOLD : 6,094.90 ▼ -2.80
- SILVER : 92.54 ▲ 0.76





