Alexandrite (named after Czar Alexander's II) is a highly prized variety of chrysoberyl. It only forms when aluminum/beryllium and chrome (which rarely occurs in nature) come together, accounting for its rarity. It is also a remarkable and valued variety that when viewed along the different crystallographic (optical) axes, changes from columbine red to orange yellow to emerald green. In addition, the stone changes from green in daylight to red in artificial light.
Alexandrite helps fighting low self-esteem people and improves central nervous system disorders. It also relieves spleen & pancreas problems. Alexandrite along with pearls and moonstone are birthstones of Gemini (Twins) that is born from May 21 - June 21 and it is the anniversary gemstone for the 45th and 55th year of marriage.
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