Alexandrite stone

Alexandrite is a stone of good omen.

Color: The best known and most widely used variety of chrysoberyl is an alexandrite. Because of its great power of absorption of certain colors, alexandrite looks green in daylight and reddish purple in artificial light. Description: BeAl2O4 Alexandrite is a remarkable and valued variety of chrysoberyl that when viewed along the different crystallographic (optical) axes, changes from columbine red to orange yellow to emerald green. 

The name's origin: Alexandrite is named after Czar Alexander's II. Birthstone: Alexandrite along with pearls and moonstone are birthstones of Gemini (Twins): May 21 - June 21. Wedding anniversary: Alexandrite is the anniversary gemstone for the 45th and 55th year of marriage. Care and treatment: Protect alexandrite from scratches, sharp blows, harsh chemicals and extreme temperatures. From the stone history: Alexandrite was discovered in 1831 in the Ural Mountains (Russia) on the Czar Alexander II birthday. 
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