What is an alexandrite?

"Alexandrite, a mesmerizing and rare gemstone, was first found in the Ural Mountains of Russia during the 1830s. As part of the chrysoberyl family, alexandrite is renowned for its unique property: it transitions from a vivid green in natural light to a rich purplish-red under incandescent light. This extraordinary "color change" effect is due to the chromium present in the gemstone's crystal structure."

Alexandrite Types


01

Natural Emeralds

Natural alexandrite forms deep within the Earth over millions of years, under specific environmental conditions that, along with trace elements, create this remarkable gemstone. Its rarity makes natural alexandrite highly coveted by collectors and gem enthusiasts.

02

Lab Grown Emeralds

Lab-created alexandrite is produced under controlled laboratory conditions that mimic the natural growth process, using the same mineral composition. These synthetic gems exhibit the same impressive color-changing qualities as natural alexandrite but are more accessible and generally more affordable, making them an appealing choice for those seeking alexandrite jewelry.

Alexandrite Properties


01

Mohs Hardness

8.5

02

Mineral

Alexandrite is a rare type of chrysoberyl, a mineral made up of beryllium, aluminum, and oxygen. Its unique color-changing ability is due to the chromium present in its crystal structure.

03

Refractive Index

Alexandrite has a refractive index ranging from about 1.746 to 1.755, which adds to its exceptional brilliance and fire. This property enhances the gemstone’s ability to reflect and refract light, further accentuating its unique color-changing effects.

Grading and Value

Shape

Alexandrite is often cut in shapes that enhance its color change, such as ovals, cushions, and rounds. Fancy cuts can also add to the stone’s uniqueness and value.

Cut

The way alexandrite is cut affects its ability to showcase its color-changing and brilliance. An expertly proportioned and symmetrical cut enhances the gemstone's optical qualities to their fullest.

Color

The saturation and hue of the colors also affect the value. A rich green in daylight and a deep red under incandescent light are preferred.

Clarity

Like other gemstones, the clarity of alexandrite is important. Stones with fewer inclusions are more valuable, although some inclusions can add character to the gem.

Carat Weight and Size

Large alexandrite stones are extremely rare, particularly those that exhibit a high-quality color change. As with most gemstones, their value rises significantly with size, given that other factors like color and clarity are also favorable.

Price

The worth of alexandrite is influenced by several important factors, such as color intensity, clarity, size, origin, and prevailing market conditions. Natural alexandrite with pronounced color-change properties, few inclusions, and exceptional quality generally commands a higher price.

Treatment

Natural alexandrite is typically kept untreated to preserve its inherent beauty and value. However, lower-grade stones might undergo treatment to enhance their color saturation or clarity, which can impact their overall value and appearance.

Origin

Russian alexandrite is often regarded as the most valuable because of its historical importance and exceptional color-changing properties.

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Alexandrite Cleaning & Care Tips

With a hardness of 8.5 on the Mohs scale, alexandrite is durable enough for daily wear and resistant to scratches and abrasions.

To maintain the appearance of alexandrite jewelry, clean the gemstones with a mixture of mild soap and warm water, using a soft brush. Steer clear of harsh chemicals, ultrasonic cleaners, and extreme temperatures, as these can impact the gem’s color and durability. Consistent care and gentle handling will help preserve the brilliance and beauty of alexandrite pieces over time.

Alexandrite FAQs

What is alexandrite?

Alexandrite is a scarce type of chrysoberyl, celebrated for its extraordinary color-changing property that varies with different light sources. It usually shows a green hue in natural or fluorescent light and shifts to a reddish-purple under incandescent lighting.

How was alexandrite discovered?

Discovered in the 1830s in Russia's Ural Mountains, alexandrite was named in honor of Tsar Alexander II, as the find coincided with his coming of age.

What causes alexandrite to change color?

The color change in alexandrite results from chromium in its crystal structure. The gemstone absorbs various wavelengths of light, making it appear green in daylight and red under incandescent light.

Where is alexandrite found?

Alexandrite is primarily found in Russia, Brazil, Sri Lanka, East Africa, and India. Russian alexandrite is particularly prized for its strong color change and historical significance.

How rare is alexandrite?

Alexandrite is among the rarest gemstones globally. Fine-quality alexandrite, especially those with a strong and vivid color change, is extremely scarce and highly valuable.

What factors determine the value of alexandrite?

The value of alexandrite is determined by its color change (strength and vividness), color quality (saturation and hue), clarity (presence of inclusions), carat weight, and origin. Russian alexandrite is frequently regarded as the most precious.

How can I tell if my alexandrite is real?

Genuine alexandrite should exhibit a noticeable color change under different lighting conditions. To verify authenticity, it's advisable to have the gemstone assessed by a certified gemologist or to acquire a certificate of authenticity from a trusted dealer.

Is alexandrite a birthstone?

Yes, alexandrite is one of the birthstones for June, along with pearl and moonstone. It is also the gemstone associated with the 55th wedding anniversary.