Tanzanite

Tanzanite Gemstone; A Rare Blue and Violet Gem

Tanzanite is a rare and highly valued gemstone belonging to the Zoisite mineral group. It is composed of calcium aluminum silicate and is known for its beautiful blue, deep blue, violet, and bluish-purple colors. Tanzanite has become particularly desirable in fine jewelry because of its rarity and distinctive optical properties.

Key Features of Tanzanite

• Mineral group: Zoisite
• Composition: Calcium aluminum silicate
• Color: Blue, deep blue, violet, and bluish-purple
• Optical property: Pleochroism
• Color-causing element: Vanadium
• Primary source: Tanzania

Tanzanite Pleochroism

One of the most distinctive characteristics of Tanzanite is its strong pleochroism. Depending on the viewing direction and lighting conditions, the gemstone can display blue, violet, and purplish hues. This attractive color variation adds to its appeal in jewelry.

Tanzanite Color and Value

Tanzanite with a deep blue color and subtle violet or purple tones is generally highly desirable. Its rarity is another important factor in its value, as significant commercial sources of Tanzanite are concentrated in Tanzania.

Tanzanite Treatment

A large proportion of Tanzanite available in the jewelry market has undergone heat treatment to enhance its blue to bluish-violet color. When purchasing a Tanzanite gemstone, it is important to consider whether the stone has been treated.

Tanzanite Care and Cleaning

Tanzanite should preferably be cleaned with lukewarm water, mild soap, and a soft brush. Ultrasonic cleaners are not recommended. The gemstone should also be protected from strong impacts, harsh chemicals, and sudden temperature changes.

Other Names

Tanzanite is closely associated with the mineral name Zoisite and is also referred to as Blue Tanzanite.