Alexandrite is a unique and rare gemstone that is known for its ability to change color depending on the lighting. This makes it a highly sought-after stone for jewelry lovers.
Alexandrite was first discovered in Russia's Ural Mountains in the 1830s and was named after Tsar Alexander II. It is a variety of the mineral chrysoberyl and is formed under high pressure and high temperature conditions. It is also found in Sri Lanka, Brazil, and Africa, but the finest quality stones are still found in Russia.
The most striking feature of alexandrite is its ability to change color. In natural daylight, it appears green or bluish-green, while in incandescent light it appears red or purplish-red. This color change is due to the presence of small amounts of chromium in the stone.
Alexandrite has a hardness of 8.5 on the Mohs scale, which makes it a durable stone suitable for daily wear. It is also resistant to scratches and chipping, but like any gemstone, it should be treated with care to avoid damage.
Alexandrite is a rare and valuable stone, with the finest quality stones commanding high prices. The most important factor when determining the value of an alexandrite is its color change, with the most dramatic and distinct color change commanding the highest prices. The size and quality of the stone, as well as the origin, are also factors that determine the value of an alexandrite.