Unveiling the Mystique of Tanzanite: The Allure and Controversy of Carbon Spots
Tanzanite, with its mesmerizing blue-violet hue, has gained immense popularity as a gemstone over the years. This rare and precious stone is found exclusively in Tanzania, making it even more alluring to jewelry enthusiasts and collectors worldwide. However, like any other gemstone, tanzanite is not without its flaws. One of the most common imperfections found in tanzanite is carbon spots.
Carbon spots are tiny black or dark brown inclusions that can be seen within a tanzanite gemstone. These spots are caused by small particles of carbon trapped within the crystal structure during its formation process. While they may seem like blemishes to some, others find them unique and appreciate them as part of the stone’s natural beauty.
1. What causes carbon spots?
Carbon spots in tanzanite are formed due to various factors during the gem’s geological formation process. Tanzanites are created when extreme heat and pressure cause chemical reactions between existing minerals such as calcium aluminum silicate (clinozoisite) and vanadium-rich muscovite mica.
During this process, traces of organic material or hydrocarbons can get trapped inside the forming crystal lattice structure, resulting in carbon spot inclusions. The presence of these particles gives rise to distinct patterns or scattered black spots within the gemstone.
2. Are all tanzanites affected by carbon spots?
Not all tanzanites have visible carbon spot inclusions; it primarily depends on their quality and clarity grade. Higher-quality stones tend to have fewer or no visible carbon spots at all.
Gemologists classify clarity grades based on how many internal flaws or inclusions a stone possesses under 10x magnification. The Gemological Institute of America (GIA) grading system ranges from Flawless (no visible inclusion) to Included (inclusion visible without magnification).
While flawless-grade tanzanites free from carbon spots are rare, it is more common to find stones with varying degrees of inclusions. Some may have minimal carbon spots that are difficult to spot without magnification, while others may have more visible and pronounced spots.
3. How do carbon spots affect the value of tanzanite?
The presence of carbon spots can impact the value and pricing of a tanzanite gemstone. In general, tanzanites with fewer or no visible inclusions command higher prices due to their rarity and enhanced clarity.
However, some collectors and buyers appreciate the uniqueness brought by these imperfections, considering them as part of the stone’s character. For such individuals, tanzanites with well-distributed and aesthetically pleasing patterns of carbon dots might even be more desirable.
4. Can carbon spots be removed or reduced?
Unlike some other gemstones where inclusions can be treated or removed through various techniques like heating or filling, treating carbon spots in tanzanite is challenging. Due to their unique formation within the crystal lattice structure, removing or reducing these inclusions without affecting the overall integrity of the stone is extremely difficult.
Moreover, any attempt at treatment would likely result in significant alteration or damage to the gemstone itself. Therefore, it is generally recommended not to try any DIY methods for eliminating carbon spots from your tanzanite jewelry.
5. How should you choose a tanzanite with visible carbon spots?
If you find yourself drawn towards owning a tanzanite with visible carbon spot inclusions, there are certain factors you should consider before making a purchase:
a) Distribution: Look for stones where black dots are evenly distributed rather than clustered together in one area. This ensures that they blend harmoniously into the overall pattern instead of being distracting focal points.
b) Size: Larger individual black dots tend to catch attention more readily than smaller ones scattered throughout the stone surface. Consider if you prefer a few large carbon spots or multiple smaller ones.
c) Contrast: Observe how the black dots contrast with the stone’s primary blue-violet color. A well-contrasted pattern can create an appealing visual effect, enhancing the gem’s overall beauty.
6. How to care for tanzanite with carbon spots?
Tanzanite is known for its relatively soft nature compared to other gemstones like diamonds and sapphires. Therefore, it requires proper care to maintain its luster and brilliance over time.
To clean tanzanite jewelry, use mild soapy water and a soft brush or cloth. Avoid using harsh chemicals, steamers, or ultrasonic cleaners as they may damage the stone or affect any underlying treatments that might have been applied.
While tanzanites are durable enough for everyday wear, it is advisable to remove them during activities that could expose them to potential impact or abrasive surfaces.
7. Can carbon spots develop over time in tanzanite?
Carbon spots found in tanzanite are formed during their initial crystallization process deep within the Earth’s crust. They do not develop or change significantly over time once the gemstone has been mined and cut into its final shape.
However, it is important to note that external factors like improper handling or exposure to high temperatures can cause fractures or damage on the surface of a tanzanite gemstone but will not affect existing carbon spot inclusions.
8. Conclusion
Tanzanites’ unique allure lies in their captivating blue-violet hue combined with natural imperfections like carbon spots. While some consider these inclusions as flaws diminishing their value, others find them fascinating features adding character and individuality to each stone.
Ultimately, choosing a tanzanite with visible carbon spots comes down to personal preference and appreciation for these distinctive markings. Whether you opt for a flawless-grade gemstone or one adorned by scattered black dots, tanzanite’s stunning beauty and rarity remain timeless.