What are treated gem stones?
Many gem stones are treated to strengthen them (like turquoise; most all of it requires stabilization), to affect color (heating, for example, can enhance or change the colors of some stones), and dyed (to enhance color). These processes are not necessarily intended to deceive, nor do they result in a diminution in value of the stone; however, if you want a completely natural stone, ask about the treatments used on the particular gem you want to buy. Often, completely natural stones of high quality are marketed that way, and you pay more.