Turquoise is the
oldest known gemstone, having been found set in jewellery from 7000
years ago. The stone was worshipped by the Incas and Aztecs who
believed it had the power to bring good fortune. It was extremely
popular in Native American jewellery and is still popular in modern
highest quality turquoise is mined at the ancient Persian mine of
Neshapur. This material is the most expensive and famous variety.
However, today the most important supplier of turquoise is the USA. It
should be noted though, that the majority of turquoise on today's
market has been treated to improve and stabilise the colour.
There are many supposed benefits obtained from turquoise, including
imparting a long life to its wearer.