925 sterling silver ring topped with an Alexandra stone

Alexandrite, also known as "Alexander's stone" or "the stone of tsars and nobles," is one of the rarest naturally colored gemstones discovered to date. It possesses a dazzling beauty that rivals that of rubies, sapphires, and other famous gemstones, and in some cases, it may even surpass them in beauty and value because it bestows a unique and unaccustomed appearance upon its wearer. From a gemological perspective, the colors of alexandrite are variations of the chrysoberyl element, also known as cyclosilicate. Despite its name "chrysoberyl," which refers to beryllium aluminate, it does not actually belong to the famous beryl mineral group. Instead, it is classified as an independent mineral group.Alexandrite is characterized by an astonishing property referred to as the color-change phenomenon, also known as the "alexandrite effect," which can be observed under specific lighting conditions, typically daylight and incandescent light. But what exactly is the color-change property? And what does it mean? Simply put, the color-change property, or "alexandrite effect," occurs when the intensity of light, its angle of incidence on the alexandrite stone, and the viewing and presentation angle change, causing the stone to appear in different colors as these conditions vary. These colors are limited to green, red, orange, and yellow. Alexandrite typically appears emerald green in daylight, while it appears raspberry red under incandescent light. It can also appear yellowish and pink. It is worth noting that some types of alexandrite may exhibit a cat's eye effect when cut and shaped in a specific way (unpolished). The color-change phenomenon, or "alexandrite effect," results from the strong absorption of light in the blue and yellow parts of the color spectrum.

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