Gold is treated into its purest form through smelting and refining. High heat, pressure and chemicals are used to remove impurities from the gold.
A gold refinery receives the raw material (rock, gold nuggets, scrap gold etc) and re-liquefies the metal in a hot furnace, then adds various chemicals to the molten substance to separate the gold from the other metals.
A sample of the gold is used in an assay to measure the purity of the gold content, usually found to be 99.9% pure. The gold can now be used in many applications, including in electronics and jewellry making.
Laxmi Computers India for more than 2 decades providing software solutions for Gold and Silver refineries to various refineries all over India.