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 : 5,598.88 ▼ -70.03
- SILVER : 75.62 ▼ -1.41





