What gem changes color in light? The gemstone known for its color-changing properties is alexandrite. This rare variety of the mineral chrysoberyl exhibits a remarkable color shift from green in daylight to red under incandescent light, making it highly prized among collectors and jewelers.
How Does Alexandrite Change Color?
Alexandrite’s unique color change is due to its complex crystal structure and the presence of trace elements like chromium. These elements absorb light differently depending on the light source. In natural daylight, which contains a balanced spectrum of colors, alexandrite appears green. Under incandescent light, which is richer in red wavelengths, the gem shows a red or purplish hue.
- Daylight: Green to bluish-green
- Incandescent light: Red to purplish-red
This optical phenomenon is known as the alexandrite effect and is a result of the gem’s ability to absorb certain wavelengths of light while reflecting others.
Where is Alexandrite Found?
Alexandrite was first discovered in the Ural Mountains of Russia in the 1830s. Today, it is also found in:
- Brazil: Known for producing high-quality stones with strong color change.
- Sri Lanka: Offers a variety of sizes, though the color change might be less dramatic.
- East Africa: Notable deposits are found in Tanzania and Madagascar.
Each location produces alexandrite with slight variations in color and clarity, contributing to its allure and value.
How to Identify Alexandrite?
Identifying genuine alexandrite involves examining its color change and other physical properties:
- Color Change: The most definitive characteristic. A strong color change is a sign of high-quality alexandrite.
- Clarity: Alexandrite is typically free of inclusions, though some stones may have slight imperfections.
- Hardness: It ranks 8.5 on the Mohs scale, making it suitable for everyday wear.
When purchasing alexandrite, always request a certificate of authenticity from a reputable gemological laboratory to ensure you are getting a genuine stone.
Alexandrite vs. Other Color-Changing Gems
Several other gemstones exhibit color change, but alexandrite remains the most famous. Here’s a comparison:
| Feature | Alexandrite | Garnet | Sapphire |
|---|---|---|---|
| Primary Color Change | Green to Red | Green to Red | Blue to Purple |
| Hardness | 8.5 | 6.5 – 7.5 | 9 |
| Rarity | Very Rare | Rare | Rare |
| Typical Origin | Russia, Brazil | Africa, Sri Lanka | Sri Lanka, Madagascar |
Garnets and sapphires can also change color, but their shifts are usually less dramatic and they are generally less valuable than alexandrite.
Why is Alexandrite Valuable?
The value of alexandrite is driven by several factors:
- Rarity: Natural alexandrite is extremely rare, especially stones with a strong color change.
- Color Change: The more pronounced the change, the more valuable the stone.
- Historical Significance: Discovered in Russia and named after Tsar Alexander II, it carries historical and cultural significance.
High-quality alexandrite can command prices comparable to diamonds, especially for stones over one carat with vivid color changes.
How to Care for Alexandrite Jewelry?
To maintain the beauty of your alexandrite jewelry:
- Avoid Harsh Chemicals: Clean with mild soap and water.
- Store Separately: Prevent scratches by storing separately from other jewelry.
- Regular Cleaning: Use a soft brush to clean and maintain its luster.
How to Choose Alexandrite Jewelry?
When selecting alexandrite jewelry, consider:
- Color Change: Opt for stones with a vivid color change.
- Cut: A well-cut stone enhances the color and brilliance.
- Setting: Choose a secure setting to protect the gem.
Is Alexandrite a Birthstone?
Yes, alexandrite is the birthstone for June, alongside pearl and moonstone. It symbolizes good fortune and luck, making it a meaningful gift for those born in this month.
People Also Ask
What is the cost of alexandrite?
The cost of alexandrite varies widely based on size, color change, and clarity. Prices can range from a few hundred dollars per carat for smaller, less vibrant stones to tens of thousands per carat for larger, high-quality specimens.
Can alexandrite be synthesized?
Yes, synthetic alexandrite is available and is created in laboratories. While it shares similar physical properties with natural alexandrite, it is significantly less expensive and should be clearly labeled as synthetic.
How does alexandrite compare to diamond in durability?
Alexandrite is quite durable, with a Mohs hardness of 8.5, making it suitable for everyday wear. While not as hard as diamond (which scores a 10), it is still a robust choice for jewelry.
Can alexandrite be used in engagement rings?
Yes, alexandrite is an excellent choice for engagement rings due to its durability and unique color-changing properties. It offers a distinctive alternative to traditional diamond rings.
What are the metaphysical properties of alexandrite?
Alexandrite is believed to bring balance and clarity, enhance creativity, and promote self-esteem. Its color change is thought to reflect the duality of the human experience and adaptability.
In conclusion, alexandrite’s captivating color change makes it one of the most unique and sought-after gemstones in the world. Whether you’re a collector or looking for a special piece of jewelry, understanding its properties and origins can enhance your appreciation for this extraordinary gem. For more insights into gemstone care and selection, explore our guides on diamond alternatives and gemstone jewelry maintenance.
