Alexandrite is a rare gemstone that is famous for its color-changing properties. It was first discovered in the Ural Mountains of Russia in 1830 and is named after Tsar Alexander II.

Alexandrite is a variety of the mineral chrysoberyl and is characterized by its green color in daylight and its red or purplish-red color in incandescent light. The color change is due to the presence of chromium in the crystal structure.

The most valuable Alexandrite stones exhibit a distinct color change and have a strong, saturated color in both daylight and incandescent light. Larger stones are rarer and therefore more expensive.

Alexandrite is a durable gemstone, with a hardness of 8.5 on the Mohs scale, making it suitable for everyday wear. It is also considered to have metaphysical properties, including bringing good luck, promoting intuition, and enhancing creativity.

Overall, Alexandrite is a highly sought-after and valuable gemstone that is prized for its color-changing properties and rarity