Tanzanite: A Collector’s Guide

Tanzanite: A Collector's Guide

Tanzanite is a relatively new gemstone, having only been discovered in 1967 in the Merelani Hills of Tanzania. It is a variety of the mineral zoisite, and its deep blue color is caused by the presence of vanadium. Tanzanite is a popular collector's item due to its rarity and beauty.

Crystal Structure

Tanzanite crystals typically have a prismatic habit, with striations running parallel to the long axis of the crystal. The crystals can be transparent to translucent, and they often have a vitreous luster. Tanzanite is a relatively hard mineral, with a Mohs hardness of 6.5 to 7.

Color

Tanzanite is most commonly known for its deep blue color, which can range from a light sky blue to a dark navy blue. However, tanzanite can also be found in other colors, including green, yellow, and purple. The color of tanzanite is caused by the presence of vanadium, and the amount of vanadium present determines the intensity of the color.

Clarity

Tanzanite can be found in a variety of clarities, from transparent to opaque. The most valuable tanzanite crystals are those that are transparent and free of inclusions. However, tanzanite with inclusions can also be beautiful and valuable, especially if the inclusions are interesting or unusual.

Cut

Tanzanite is typically cut into a variety of shapes, including round, oval, pear, and emerald. The cut of a tanzanite crystal can affect its appearance and value. For example, a well-cut tanzanite crystal will have a beautiful sparkle and brilliance, while a poorly cut tanzanite crystal may appear dull and lifeless.

Carat Weight

The carat weight of a tanzanite crystal is another important factor in determining its value. The larger the carat weight, the more valuable the tanzanite crystal will be. However, it is important to note that carat weight is not the only factor that determines the value of a tanzanite crystal. The color, clarity, and cut of the crystal are also important factors.

Caring for Tanzanite

Tanzanite is a relatively delicate gemstone, so it is important to take care of it properly. Tanzanite should be stored in a cool, dry place, and it should be protected from exposure to sunlight. Tanzanite should also be cleaned regularly with a mild detergent and water. Avoid using harsh chemicals or ultrasonic cleaners, as these can damage the gemstone.

Tanzanite is a beautiful and valuable gemstone that can make a great addition to any collection. By following these tips, you can help to protect your tanzanite and keep it looking its best for years to come.