Coloured gemstones are found in all the colours of the rainbow.Red for beautiful rubies, spinels, tourmalines and garnetsOrange - for sapphires and citrinesYellow - for sapphires and amberGreen - for emeralds, tourmalines, peridots and tsavorite garnetsBlue - for sapphires, aquamarines and blue topazIndigo - for sapphires, iolites, spinels and tourmalineViolet - for sapphires and amethysts