What is the composition of rolled gold? Is it genuine gold? Why is genuine gold not used for making jewellaries ?
Pure gold is very soft in nature. In order to use gold as jewellary it requires certain hardness. Adding other elements which have similar chemical properties like Ag, Cu will enhance its properties.
Therefore whatever gold is available is not pure gold, it contains different amounts of other elements.
Ex: 24 carat gold contains 99% of gold, 22 carat gold contains 91% of gold and 18 carat gold contains 75% of gold.