How is it possible for alexandrite's colour to change?

This isn't magic — it's real science. The chromium element present in alexandrite's crystal structure absorbs different wavelengths of light differently. In daylight (which is rich in blue-green rays), it appears green or blue-green, while in warm yellow incandescent light (which is rich in red rays), it starts to appear red or purplish-red. This is called the 'alexandrite effect.'

When was alexandrite discovered, and how did it get its name?

Alexandrite was discovered in the 1830s in Russia's Ural Mountains. It was named after Russia's future Tsar, Alexander II. It's a relatively modern discovery, so it has no ancient Vedic astrological history.

Is there any connection between alexandrite and cat's eye (lehsunia)?

Yes, interestingly, both alexandrite and cat's eye (lehsunia) are varieties of the same mineral family called chrysoberyl, although their properties and market identities are completely different.

What should you be most careful about when buying genuine alexandrite?

The market has a large number of lab-created alexandrite and other colour-change synthetic stones (such as colour-change sapphire or synthetic corundum), which look just like the real thing. Since natural alexandrite is extremely rare and expensive, never buy it without a certificate from a recognized gemological lab (such as GIA or GRS).

How much does alexandrite cost?

Alexandrite's price varies enormously based on the intensity of its colour change, clarity, carat weight, and origin, and since natural alexandrite is counted among the rarest gemstones in the world, quoting a single fixed price wouldn't be accurate. The most reliable approach is to share your requirement and budget and request quotations from different jewellers for comparison — which we do for you, free of charge.

Can alexandrite be worn every day, or does it need special care?

Since alexandrite has no classical rule for wearing it (specific day, metal, or mantra), there's no traditional restriction on wearing it daily. This chrysoberyl-family gemstone is quite hard on the Mohs scale (about 8.5), so it's considered relatively durable for everyday wear — even so, it's good practice to remove it and keep it safe during heavy physical work, swimming, or sleeping, so the setting doesn't loosen and there's no risk of losing the stone.

Alexandrite: The World's Rarest Gemstone — Green by Day, Red by Night

Quick Answer

Alexandrite is an extremely rare chrysoberyl-family gemstone that appears green in daylight and red under warm incandescent light — known as the “alexandrite effect,” a genuine scientific phenomenon rather than any astrological property. It was discovered in Russia in the 1830s, so it has no ancient Vedic astrological history. Because natural alexandrite is so rare and expensive, the market is full of synthetic and lab-created versions, so never buy one without a certificate from a recognized gemological lab.

Introduction: What Is Alexandrite

Alexandrite is often called “emerald by day, ruby by night” — and this isn’t a fanciful comparison, but a description based on its real, scientifically verified colour-change property. It’s a rare variety of the mineral chrysoberyl, which appears green or blue-green in natural light and suddenly shifts to red or purplish-red under warm, yellow light (such as an incandescent bulb). This colour change is so dramatic that first-time viewers are often startled, and this exact quality is what makes alexandrite one of the rarest and most valuable coloured gemstones in the world.

Quick Facts

Feature	Information
Gemstone	Alexandrite
Gem family	Chrysoberyl

Interesting Facts and Modern Popularity

Alexandrite was discovered in the 1830s in mines in Russia’s Ural Mountains. It was named in honour of Russia’s future Tsar, Alexander II, because its two dominant colours — green and red — matched the national colours of Imperial Russia at the time. Because of this, it quickly became a favourite gemstone among royal families and wealthy collectors.

The science behind its colour change is real, not a myth. The chromium element present in alexandrite’s crystal structure absorbs and reflects different wavelengths of light differently. In natural daylight, where blue-green rays dominate, the stone appears green; while under warm, yellow artificial light, where red rays dominate, the same stone starts to show a red tint. This phenomenon is called the “alexandrite effect” in gemology, and it’s exactly what sets it apart from all other coloured gemstones.

Another interesting fact is that alexandrite, like cat’s eye (lehsunia), is part of the chrysoberyl mineral family, although the identification and market value of the two are completely different. Since it was discovered in the nineteenth century, it’s important to be clear that alexandrite has no mention in any ancient Vedic text or classical astrological tradition — it has never been part of the navratna or substitute-gemstone system. In modern Western tradition, it’s included as an alternative birthstone for June. Its real identity lies in its rarity, the science behind it, and its priceless auction stories.

How to Identify Genuine Alexandrite

Natural alexandrite is so rare that the market is filled with lab-created alexandrite and other colour-change synthetic stones (such as colour-change synthetic corundum or sapphire) sold in its place. So special care is needed when buying:

Treat a lab certificate as essential: Ask for a certificate from a recognized gemological lab (such as GIA or GRS) that clearly states whether the stone is natural or lab-created.
Check the colour change: Genuine alexandrite’s colour change looks subtle and natural, while cheap synthetic alternatives often show a change that’s very fast and unnatural — even so, leave this check to an expert or a lab.
Be cautious about the price: If a large alexandrite is available at a very low price, it’s almost certainly synthetic or some other fake stone.
Choose a trustworthy seller: Since natural alexandrite is counted among the most expensive coloured gemstones in the world, buy only from a reputable and certified source.

Expert Tip: When buying alexandrite, don’t rely on a shop’s ordinary LED or spotlight lighting — examine the stone both in natural daylight from a window and separately under a warm, yellow incandescent bulb. Many sellers use special display lighting that can make even an ordinary stone appear to show a dramatic colour change, so don’t make a decision without seeing the real change under both types of light.

Factors That Affect the Price

Alexandrite’s price mainly depends on:

Intensity of colour change: The clearer and more dramatic the shift from green to red, the higher the price.
Clarity and cut: A clean stone without blemishes is rare and considered more valuable.
Carat weight: Large natural alexandrite is extremely rare, so the price rises exceptionally as weight increases.
Origin: Collectors place special value on older alexandrite from the original Russian source, though today good-quality alexandrite is also found from sources like Sri Lanka and Brazil.

If you’re thinking of investing in a rare gemstone like alexandrite, through Free GemStone Broker you can request certified quotations from different trustworthy jewellers and compare them safely.

Who Should Avoid It / Check Before Wearing

Since alexandrite has no classical astrological basis, don’t decide to wear it as a remedy for a planetary affliction or a chart correction based purely on something read online.
Consult a doctor before wearing any new jewellery or gemstone during pregnancy or in any serious health condition, especially if there’s a risk of metal or skin allergy.
Never buy such a rare and expensive gemstone without a lab certificate, no matter how trustworthy the seller seems or how compelling the story sounds.
If your budget is limited, buy lab-created alexandrite only when it’s clearly described as “lab-created,” not at natural-stone prices — there’s a huge difference in price between the two.

Common Mistakes

Buying immediately based only on the colour change, without checking whether the stone is natural or lab-created.
Examining the stone only under one particular light in the shop, without checking it under different light sources before deciding.
Trusting a very cheap “alexandrite” available online without checking the certificate.
Buying it as a classical substitute gemstone for correcting a planetary affliction, when no such traditional Vedic basis exists for it at all.

Precautions

Alexandrite is an extremely rare and expensive gemstone with no ancient Vedic astrological significance — don’t view it as a remedy for a planetary affliction or a financial guarantee. It’s also not a substitute for medical treatment or professional medical/financial advice. Given the abundance of fake and lab-created alternatives, buy it only with a certified lab report, from a trustworthy source.

Key Takeaways

Alexandrite belongs to the chrysoberyl family and is a close relative of cat’s eye (lehsunia).
Its colour change (green by day, red under warm light) is a real scientific phenomenon, not a myth.
It’s a modern (nineteenth-century) discovery, so it has no connection to the navratna system or Vedic astrology.
Never buy it without a certificate from a recognized lab, since synthetic and lab-created alexandrite are common in the market.
Price depends on the intensity of the colour change, clarity, carat weight, and origin.

Conclusion

Alexandrite is special because of the story of its discovery, its genuine scientific colour-change property, and its rarity — not because of any astrological tradition, since no such history exists for it at all. For those who want to buy it for its unique quality and rarity, a certified lab report and a trustworthy seller matter most. We can help you find genuine alexandrite with the right certificate at the right price.