Techniques Frequently Used by Small-Scale Refiners to Refine Silver Acid Leaching: Nitric acid is used to dissolve the silver. The silver-containing acid is transferred to another container. Contaminants that won’t dissolve are left behind. Silver precipitant crystals (SPC) are added…

The Canadian Gold Maple Leaf Coin is one of the purest gold coins in the world, with a fineness of.9999. The coin was introduced in 1979 by the Royal Canadian Mint and has been minted every year since then. The…