Miller process

The Miller process is a method used to purify gold by removing impurities. It involves blowing a stream of pure chlorine gas into molten gold. The impurities in the gold react with the chlorine to form chlorides, which separate from the molten metal as they're less dense. This process quickly and efficiently reduces the impurities, resulting in gold that’s approximately 99.5% pure. It’s commonly used in gold refining because it’s fast, effective, and produces high-quality gold suitable for jewelry and investments.