Alexandrite was named in 1842 in name of Tsesarevitch Alexander (in 1855 Alexander II - Emperor of Russia) on the day he reached adulthood. There are other possible names for the stone - it is the Ural chrysoberyl, which is able to change the color. The Mohs hardness of Alexandrite 8.5 is one of the hardest minerals, with a density of 3.68 - 3.77 g/cm3. It is a transparent stone with a glass shine and a peculiarity of color change (reverse) from grayish blue to emerald green when daylight, and to purple and saturated purple-red when artificial lighting. The largest deposits of Alexandrite in Brazil, India, Madagascar, Zambia, as well as in the Urals, where mining is carried out in underground mines on an equal footing with other equally valuable minerals. Decorations made of alexandrite: Alexandrite is one of the rarest and therefore very expensive stones. Nowadays, Alexandrites are second only to sapphires, emeralds, rubies and diamonds. Alexandrites mined in the Urals are consider