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The alexandrite crystal is a fascinating gemstone known for its remarkable color-changing properties. Chemically, it belongs to the chrysoberyl family and consists of beryllium aluminum oxide. The unique color change of alexandrite results from its complex chemical composition and the presence of chromium as a trace element, which gives it its characteristic green to red color.
Alexandrite was first discovered in Russia in the 19th century and was named in honour of the then Tsar Alexander II. The crystal displays an olive green to emerald green color in daylight and transforms into a red to purple-red color spectrum in artificial light or in twilight. This dramatic change is known as the “alexandrite effect” and is particularly appreciated by collectors and jewelry enthusiasts.
In laser technology, the alexandrite crystal is valued for its physical properties. It is capable of emitting light waves in the near infrared range when excited by other light sources. This property makes it ideal for use in an alexandrite laser, which is used in dermatology and aesthetic medicine, particularly for laser hair removal. In these applications, the unique wavelength of light generated by the alexandrite crystal is used to target hair follicles while leaving the surrounding skin unharmed.
