Blue Topaz :

Topaz of the best known gemstones.Topaz is the Texas state gemstone as well as the birthstone for the month of November. It occurs naturally in many colors including orange, brown,blue,green,pink and red. Colorless topaz, a common variation, can be treated by irradiation to produce a wide range of shades of blue.The classical precious topaz is yellow or yellow to orange-brown in colour.

It is a fluorine aluminium silicate and comes in yellow, honey-yellow, yellow-brown, brown, green, blue, red and pink.and sometimes it has no colour at all.Blue topaz was adopted as the state gemstone as the result of legislation approved March 26, 1969.the topaz is attributed with a cooling, styptic and appetising effect.