““24 carat gold is a pure naturally occurring yellow metal. There are 4 basic shades of gold alloys: yellow gold, white gold, rose gold and green gold. A huge range of other colored golds are also possible including red (gold and copper), grey (gold, iron and copper), purple (gold and aluminum), blue (gold and iron) and black (gold and cobalt), depending on the amounts of different metals alloyed together.””
