Imperial Topaz

General Information
The name topaz comes from the Sanskrit meaning “fire”, pure topaz is colourless and transparent but typical topaz is yellow, reddish-orange, or blue brown. The most valued natural colour is pink.

Imperial topaz is yellow, pink (rare, if natural) or pink-orange. Brazilian Imperial Topaz can often have a bright yellow to deep golden brown hue.

Naturally occurring blue topaz is quite rare, typically it is colourless and light blue material is heat treated and irradiated to produce a more desired darker blue.
Orange topaz, also known as precious topaz, is the traditional November birthstone and the symbol of friendship.

It is also given for the 4th and 23rd wedding anniversary.
 

History
In the middle Ages, the name topaz was used to refer to any yellow gemstone, but in modern times it denotes only the silicate described above.
 

Biggest Ever Found

A faceted topaz weighing 22,892.50 carats, being the largest cut yellow topaz in the world is displayed at the Smithsonian Museum’s collection (USA).