Let me tell you My Origin - London Blue topaz

 It is found in various countries around the world. USA, Afghanistan, Australia, Myanmar, China, Germany, Pakistan, Sri Lanka, and Brazil are the chief producers of this Brilliant Blue Stone. Brazil is the heart of London Blue Topaz, producing the finest and the largest London Blue Topaz of top quality.

Topaz is as old as the roman and Greek era. In medieval times, it was mined in the mountains of Germany. Several rulers wore it as jewelry as it was a rare and prized stone.

Topaz mainly occurs in white color and Blue Topaz is a rarity. Hence, White Topaz is radiated to produce Blue Topaz which is also called Swiss Blue Topaz.

London Topaz is produced by exposure to radiation in a nuclear reactor. When Topaz is exposed to fast neutrons, the radiation changes the color centers, producing a deep blue color. Further heat treatment is often used to lighten the inky color.

From, as blue as an azure sky to as dark as ink, London Blue Topaz can be found in various shades. Due to being Dichroic, a tint of green color is often seen in this stone when moved in the light.