Gold processing refers to the procedures used to purify gold and convert it into different forms. Synonyms for gold processing include refining, purification, extraction, smelting, and amalgamation. Refining involves removing impurities from the gold to increase its purity and value. Purification is a process that involves removing unwanted materials from the metal through chemical reactions. Extraction is a method of isolating gold from raw material. Smelting involves heating the gold until it melts and then using a flux to separate impurities from the metal. Amalgamation is a process that involves the combination of mercury and gold to form an amalgam that can be further processed.