With the new technology of permanent and safe color enhancement, the market is
now supplied with a beautiful blue gemstone.
Color: blue. Commercial names such as sky-blue, Swiss-blue, cobalt blue are sometimes used to refer to different blue hues.
Tone: light to dark.
Transparency: transparent and free of visible inclusions.
Treatment: all blue topazes in the market are color-induced by the combination of radiation and heating processes.
Price structure: fine faceted blue topaz ranges from US$6 to US$12 per carat.
