Refining Rhodium
20:53
Precious Metal From Catalytic Converter
31:23
Transformando joias antigas em barras de ouro puro
27:09
Smelting Jeff William's Secret Gold
19:08
Metal Refining & Recovery, Episode19: Gold From Mercury
18:11
Turning a BLOB into PURE GOLD!
8:59
Extracting Cyanide From Cherry Pits
12:37
Smelting Catalytic Converters, Platinum, Palladium, & Rhodium
51:58