It is a stone in the multiple colors. She is found, most of the time (colorless) white, it is then used to imitate the diamond in the similar properties (hardness of 8), powder for the polishing, or still in optics for lenses. Light blue "Sky blue", more saturated "Swiss blue" and dark blue "London blue", are handled blue Topazes, found most on the market. Natural blue Topazes are very rare. The varieties of the most sought colors are the ones "Imperial" said Topazes. Of yellow in orange-rosé, they are extremely rare and of a great beauty.
The Mystic Topaz which shows an effect of splendid rainbow, is in fact a colorless Topaz covered with a cover which gives this effect. Scratch a little the breech of your stone and you will be surprised well …
The most known for some Topazes is set in the Portuguese crown: Braganza. For a long time taken for a diamond, she weighs 1680ct. The "Name Imperial Topaz" of 97.45ct is an admirable imperial Topaz in Field Museum of National History, in the United States.
The topaz is the birthstone of November.
The topaz is the stone of the anniversary of 44 years of marriage: " wedding of Topaz ".
To know more about the mineralogy of the Topaz, see mindat.org->
