Topaz Jewelry

Where the name comes from: The Greek philosopher Pliny mentioned the island of Topazus (today known as Zabargad) in the Red Sea where topaz was first mined.
Where the stones come from: Widespread, Brazil has the largest and most important deposits, also Russia, China, Pakistan and the USA, particular colors often come from particular localities
Chemistry: A silicate  of aluminium and fluorine, Al₂SiO₄(F,OH)₂
Colors: Pure topaz is colorless, there are many different impurities that may give it almost any color though rarely natural pink, purple or deep blue.
...and another thing: The color of topaz can be changed by heating or by electron or neutron bombardment. In these ways are the otherwise rare blue and pink shades obtained.

Prices correct at time of writing - subject to change