Alexandrite is a rare variety of chrysoberyl. A russian mineralogist Earl Lev Alekseevich Perovski found it in the 1830s in the emerald mines of Ural. While he was examining this interesting mineral, supposedly in candle light he noticed that, alexandrite shows different color from its color in natural light. He wanted to get a good impression from the russian tsar, so that the mineralogist (later became the Minister of the Interior) named this rare mineral after the tsar’s son Alexander (Tsar Alexander II). Unconventionally alexandrite has a greenish color in natural light, but in artifical light it is reddish or purplish. It is a very rare mineral, its price depends from that, how does it show its color change. Usually it is found in slates, but also issues in other rocks (eg. pegmatite) and it can be sluiced from the sediment of rivers. Localities: Sri lanka (Ceylon), Russia (Ural running out), Brasil (Minas Gerais), Zimbabwe, Mianmar (Burma), Tanzania, India.