Everything You Need to Know About Different Alexandrite Colors
Alexandrite, a rare and mesmerizing gemstone, is renowned for its unique ability to change colour under different lighting conditions. This extraordinary feature has earned it the nickname “emerald by day, ruby by night.” First discovered in Russia's Ural Mountains in the 1830s, alexandrite continues to captivate gem enthusiasts with its enchanting hues. Here's everything you need to know about the different colours of alexandrite and what makes this gemstone so special.
The Phenomenon of Colour Change
Alexandrite is a variety of the mineral chrysoberyl and owes its color-changing property to the presence of chromium in its crystal structure. This phenomenon, known as the alexandrite effect, occurs because the gemstone absorbs light differently depending on the type of lighting. Under daylight or fluorescent light, alexandrite typically appears green to bluish-green. Under incandescent or candlelight, it shifts to red, purplish-red, or raspberry red.
Daylight Colours: Green to Bluish-Green
In natural daylight or fluorescent light, alexandrite most commonly displays shades of green. The exact hue can range from a bright, vibrant green to a more subdued bluish-green. The quality of this green colour plays a significant role in the gemstone's value. The most prized alexandrite’s exhibit a pure, intense green without any secondary hues or brownish tones.
Evening Colours: Red to Purplish-Red
When viewed under incandescent light, alexandrite undergoes a dramatic transformation, shifting to red, purplish-red, or even raspberry red. This colour change can vary in intensity and hue, with some alexandrite’s displaying a more vivid red while others take on a deeper purplish-red. The degree of colour change is a critical factor in determining the gemstone's quality and value. The most sought-after alexandrite’s exhibit a strong and distinct color change.
Rare Colours: Yellowish-Green, Brownish-Red, and Beyond
While green to red is the classic color change associated with alexandrite, some stones may display less common color variations. In certain lighting conditions, alexandrite can show yellowish-green or brownish-red hues. These stones are typically less valuable than those with the traditional green to red color change, but they can still be highly attractive and unique.
Factors Influencing Alexandrite Colors
Several factors influence the colours displayed by alexandrite:
- Origin: The location where alexandrite is mined can affect its colour characteristics. Russian alexandrite’s, for instance, are known for their vivid green to red colour change, while stones from other locations like Brazil, Sri Lanka, and Africa may exhibit slightly different hues.
- Cut and Size: The cut of the gemstone can influence its color change by affecting how light enters and exits the stone. Larger alexandrite’s often display a more pronounced color change than smaller ones due to the increased depth and volume of the gemstone.
- Clarity: Like other gemstones, the clarity of alexandrite can impact its appearance. While inclusions are common in alexandrite, stones with fewer inclusions tend to display their colours more vividly.
Synthetic Alexandrite
Due to the rarity and high value of natural alexandrite, synthetic versions have been created in laboratories. These lab-grown stones mimic the color change properties of natural alexandrite and can be an attractive and more affordable alternative. However, it’s essential to distinguish between natural and synthetic alexandrite when purchasing, as their value and rarity differ significantly.
Conclusion: A Gem of Many Faces
Alexandrite’s unique color-changing ability makes it one of the most fascinating and coveted gemstones in the world. Whether you’re drawn to the vibrant greens of daylight or the deep reds of evening light, alexandrite offers a captivating display that’s sure to enchant. By understanding the different colors of alexandrite and the factors that influence them, you can appreciate the true beauty and rarity of this extraordinary gemstone. Whether you're a collector, a jewelry enthusiast, or someone looking for a unique piece, alexandrite is a gem that promises to dazzle and delight.
