Congatulations! You have discovered a Rainbow Topaz gemstone, also known as Mystic Topaz. Topaz is a very refractive stone and harder than many other gemstones, with a hardness of 8 on the Mohs scale. It has no special sensitivity to chemicals and can be used with any jewelry application.
A new high tech enhancement process applied to colorless stones has created this new variety known as Rainbow (or Mystic) Topaz. It displays a stunning rainbow effect that makes it unique, fashionable and different.The name topaz is probably derived from an island in the Red Sea, “Topazos”, today called Zabargad, and is also the ancient source of peridot. Topaz is the birthstone for the month of November.