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 : 5,418.90 ▼ -204.72
- SILVER : 68.79 ▼ -4.53





