Earth consists of three layers.they are:
crust is the upper most layer.we live in this layer.it extends upto12,00 km above the sea level.
mantle is the layer below the crust.it consists of molten lava which shoots up through volcanoes.it mainly consists of heavy rocks,silver and gold.
core is again divided into two types.the inner core and the upper core.
the upper core mainly consists of jeavy metals like iron,gold and other heavy metals.
the inner core extends upto 6000 km above the sea level.it consists of gold,diamond etc.