The Midtown Gazette

A Columbia Journalism School newsroom covering Midtown Manhattan in the heart of New York City.


Tag: Heat Treatment
  • Natural Sapphires Versus Treated Sapphires

    Natural Sapphires Versus Treated Sapphires

    Looking for sapphire jewelries in Manhattan’s Diamond District? Be careful. Do you know the difference between a natural piece and a treated one? Can you distinguish them? How do you feel about the fact that most of the sapphires in the 47th Street between Fifth and Sixth Avenue are heat-treated? Read this and find out…