What is Alexandrite? The Color-Changing Gemstone

What is alexandrite?

Alexandrite is a rare and valuable gemstone known for its unique ability to change color depending on the light. In natural daylight, alexandrite displays shades of green to blue-green; under artificial light, the stone changes to red, purple, or brown. This special property — pleochroism — makes alexandrite one of the most fascinating gemstones in the world. Alexandrite belongs to the chrysoberyl family and scores 8.5 on the Mohs scale. Check out our crystal jewelry collection for unique gemstones.

History of alexandrite

Alexandrite was first discovered in the Ural Mountains in Russia in 1830 and was named in honor of the future Tsar Alexander II. Its discovery coincided with the young Tsar's birthday, leading the stone to be seen as a symbol of wealth and protection. Its dual colors — green and red — also symbolized the imperial colors of Russia. Due to its rarity and striking color change, alexandrite quickly became one of the most sought-after gemstones among the Russian nobility. Today, alexandrite is primarily found in Sri Lanka, Brazil, and some other parts of the world, though Russian alexandrite is still considered the most valuable.

Properties of alexandrite

Color change (pleochroism) — its most striking feature: green to blue-green in daylight, red to purplish-red under artificial light. Caused by the presence of chromium in its chemical composition. Hardness — 8.5 on the Mohs scale, very hard and durable, ideal for daily wear. Chemical composition — beryllium, aluminum, and oxygen with traces of iron, titanium, and chromium. Rarity — exceptionally rare, especially specimens with a strong color change. This makes the stone highly coveted and precious.

Alexandrite in jewelry

Due to its rarity and color-changing properties, alexandrite is considered a luxury gemstone for engagement rings, pendants, earrings, and bracelets. The color-changing effect is particularly visible when the stone is in motion — perfect for earrings and pendants. Alexandrite is also used in commemorative jewelry due to its rarity and symbolic value. Given the high price of natural alexandrite, synthetic varieties are also available, offering the same color change.

Tips for buying alexandrite jewelry

Look for the color change — the more dramatic the shift from green to red, the more valuable the stone. Ask about the origin — Russian alexandrite is considered the best quality; stones from Brazil and Sri Lanka are also valuable. Consider synthetic options — synthetic alexandrite offers the same color change at a significantly lower price. Check out our jewelry collection for unique stones and gemstones.

Frequently asked questions about alexandrite

Why does alexandrite change color?

The color change is due to the presence of chromium in the stone, which causes the gemstone to react to different wavelengths of light. Daylight and artificial light have different wavelengths — daylight activates the green hue, artificial light the red.

How rare is alexandrite?

Alexandrite is extremely rare, especially varieties with a strong color change. High-quality natural alexandrite is becoming increasingly difficult to find, making the stone very valuable — rarer than diamond per carat.

Is alexandrite suitable for everyday wear?

Yes, thanks to its hardness of 8.5 on the Mohs scale, alexandrite is durable enough for daily wear. It is an excellent choice for rings and earrings that are worn regularly.

How do I care for alexandrite jewelry?

Clean alexandrite with lukewarm water and mild soap. Avoid harsh chemicals, ultrasonic cleaning, and hard impacts. Store separately in a soft jewelry box to prevent scratches.

What is the difference between natural and synthetic alexandrite?

Natural alexandrite is extremely rare and precious. Synthetic alexandrite has the same chemical composition and color change but is grown in a laboratory — significantly more affordable and a popular choice for jewelry.