Rare example of chameleon stone alexandrite sells at Skinner
According to a popular story, alexandrite, one of the three main varieties of chrysoberyl, was discovered in the Urals by the Finnish mineralogist Nils Gustaf Nordenskiöld (1792-1866) and named in honour of the future Tsar Alexander II of Russia.
The stone’s most distinctive property is that it changes colour (the result of the phenomenon of m…