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 color can range from light blue to deep violet. Tanzanite is a popular collector's item due to its rarity and beauty.

Crystal Structure

Tanzanite has a complex crystal structure that is responsible for its unique optical properties. The crystals are typically elongated and prismatic, and they can exhibit a variety of colors, including blue, violet, and green. Tanzanite is also pleochroic, which means that it can appear to change color when viewed from different angles.

Color

The color of tanzanite is caused by the presence of vanadium and chromium impurities. The vanadium gives the stone its blue color, while the chromium gives it its violet color. The relative amounts of these two elements determine the exact shade of tanzanite.

Clarity

Tanzanite is typically found with inclusions, which are tiny flaws in the crystal. These inclusions can be visible to the naked eye, or they may be so small that they can only be seen under a microscope. The clarity of a tanzanite is determined by the number, size, and location of these inclusions.

Cut

Tanzanite is typically cut into a variety of shapes, including round, oval, pear, and emerald. The cut of a tanzanite can affect its appearance and value. A well-cut tanzanite will maximize the stone's color and brilliance.

Carat Weight

The carat weight of a tanzanite is measured in carats. One carat is equal to 0.2 grams. The carat weight of a tanzanite is an important factor in determining its value.

Value

The value of a tanzanite is determined by a number of factors, including its color, clarity, cut, and carat weight. The most valuable tanzanites are those that are deep blue in color, have few inclusions, and are well-cut. Tanzanite is a relatively rare gemstone, and its value has been increasing in recent years.

Caring for Tanzanite

Tanzanite is a relatively soft 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 harsh chemicals and extreme temperatures. Tanzanite should also be cleaned regularly with a mild detergent and water.

Tanzanite is a beautiful and valuable gemstone that can make a great addition to any collection. By understanding the properties of tanzanite, you can make an informed decision about whether or not to invest in this rare and beautiful stone.