Tanzanite is a rare and valuable gemstone that is found only in one place in the world – the Merelani Hills in Tanzania. This makes it a highly sought after investment opportunity for those interested in acquiring a piece of this rare gemstone.
Tanzanite is known for its unique blue-violet color, which can range from a light sky blue to a deep indigo. The color and quality of the stone is determined by its origin within the Merelani Hills, with different blocks yielding different qualities of tanzanite.
Block D is considered to be the most valuable of the tanzanite blocks, producing the finest quality of gemstones. These stones are known for their intense saturation of color, high clarity, and minimal inclusions.
However, tanzanite is a finite resource, and it is estimated that the current supply of this gemstone will be mined out within the next 20 to 30 years. This means that the value of tanzanite is expected to increase over time, making it an attractive investment opportunity.
Aside from Block D, there are also Blocks A, B, and C which yield tanzanite of varying quality. Blocks A and B produce tanzanite with a lighter, more blue color, while Block C is known for its deep indigo stones.
Tanzanite is found in the foothills of Mount Kilimanjaro, which is the highest peak in Africa. This mountain range is also home to other precious minerals, making it a valuable source of investment opportunities for those interested in acquiring rare gems and minerals.
Here is a list of the key factors to consider when grading Tanzanite:
- Color: The color of Tanzanite is its most important attribute, with shades of blue and violet being the most valuable.
- Clarity: The clearer the stone, the more valuable it is, but small inclusions are often acceptable in Tanzanite.
- Cut: The cut of Tanzanite affects its brilliance and sparkle, with well-cut stones being more valuable.
- Carat Weight: The larger the stone, the more valuable it is, with larger stones being more rare.
- Origin: Tanzanite from Tanzania is the most valuable, with stones from other countries being less valuable.
- Treatment: Tanzanite is often heat-treated to enhance its color, with untreated stones being more valuable.
- Rarity: Tanzanite is a rare gemstone, with larger and more valuable stones being even rarer.