Tag Archives: allochromatic

December, 2014

• 23 December

  BEYOND BLUE: A RAINBOW OF TOPAZ COLOURS

  

  Did You Know? Many consumers know topaz simply as an inexpensive blue gem, but you might be surprised to learn its blue colour is rarely natural – it’s almost always colourless topaz that’s been treated to give it this blue colour. You might also be surprised to learn that topaz …