Gold is a metallic chemical element, atomic number 79, symbol Au, known in Latin as aurum, Spanish as oro. Commonly used in making rings and necklaces.
It is used to measure the purity of gold alloys. One karat (or carat) is equal to 1/24 purity by mass. 24 carat (millesimal fineness 99.9% or higher)purity 22 carat (millesimal fineness 91.6%)purity...