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 : 6,035.01 ▼ -24.00
- SILVER : 89.60 ▲ 0.12





