|The world's purest and second largest Russian alexandrite gemstone appeared for sale at Dubai International Jewellery Week for $2 million.|
The stone, which weighs 9.65 carats, has been certified by GemResearch Swisslab and Swiss Foundation for the Research of Gemstones.
|Named in honour of Tsar Alexander II, alexandrites are found in Russia, Brazil, India, Sri Lanka and Madagascar - but the Russian version is considered the rarest and shows off the most dramatic colour changes when placed under different light.|
|Fine alexandrite is green to bluish green in daylight and red to purplish red in incandescent light. Production from Russian mines is very limited today, which means the intense, fine-colored gems they produced in quantity less than 200 years ago are much more scare. Most alexandrites are small, weighing less than one carat. Larger sizes and fine quality raise prices dramatically.|