Alexandrite is a beryllium, Aluminium Oxide. It is actually a Chrysoberyl which belongs to the Oxide Class of minerals. Alexandrite is named for the former czar of Russia, Alexander II, and was first discovered in the Ural Mountains of Russia, supposedly on the day of his birth. Alexandrite has since been discovered in Russia, Australia, Brazil, India, Madagascar and Myanmar.
Synthetic corundums spiked with trace elements that yield an alexandrite-like color change are sold as alexandrite on the gemstone market. These stones have a red-violet, near-amethyst color in incandescent light and a blue-violet color in daylight. They are far cheaper than natural alexandrites, which are some of the rarest and most expensive of gemstones in the world.
Chromium gives alexandrite its colour and while in most minerals a trace element like chromium would provide only one color to the mineral, in alexandrite it gives it two! Coloring agents are dependent on the wavelength of light and the chemical bonds in the crystal to determine the color that they will cause. An element like copper, in normal light, can cause a green color in malachite and a blue color in azurite, it all depends on the character of the chemical bonding. In a single specimen of alexandrite, the chromium is in such a balanced situation that the color of the specimen depends on the character of light that hits the crystal. If the light is natural sunlight or fluorescent light, the crystal will be green; however, if the light is incandescent light from a common indoor light bulb, then the crystal will appear red.
Alexandrite and the chakras
It is particularly useful for chakra work and massage involving the heart when you wish to calm feelings of being lost and have no interest in pursuing a fulfilling career. This crystal when placed on the third eye will assist you in controlling your worry, fear and the feeling that people are talking about you behind your back.