Tanzanite

Tanzanite Stone Meaning and History

Tanzanite, though a relative newcomer to the world of colored stones, stands out as one of the most thrilling gem discoveries of the 20th century. Initially identified as the mineral zoisite in 1962, blue stones emerging from Tanzania sparked excitement. However, it wasn't until 1967 that prospectors located the primary source for this stone: the Merelani Hills. Eventually, it was named tanzanite in honor of its country of origin. Described as "velvety," the tanzanite birthstone owes its allure to its deep and saturated color, ranging from a pure rich blue to violet, with the blue hue considered most valuable.

Tiffany & Co. recognized the international appeal of tanzanite and became its main distributor. In 1968, Tiffany launched a significant advertising campaign to promote it. With its vivid colors, high clarity, and potential for large cut stones, tanzanite quickly captured the public's imagination. Today, it is also the gemstone associated with the 24th wedding anniversary.

Where is Tanzanite found?

The Merelani Hills of northern Tanzania stand as the sole location on earth where tanzanite is commercially mined. The local landscape is characterized by grass-covered hillsides, scrub brush, rocky soil, and occasional trees. In the major mechanized operations there, thousands of workers extract tanzanite from mines dug over 100 meters (more than 300 feet) deep into the earth. To the north of the mines, the snow-covered slopes of Mount Kilimanjaro tower over the region.

Tanzanite Stone Care and Cleaning

This stone, with a hardness of 6 to 7 on the Mohs scale, exhibits resistance to normal heat, light, and common chemicals. However, it may crack when exposed to very high temperatures or sudden temperature changes, and it abrades easily. Additionally, it can be attacked by hydrochloric and hydrofluoric acids.

Most tanzanite initially appears as brownish zoisite and undergoes heat treatment to achieve the blue to violet hues characteristic of this stone. The resulting color is permanent, and there are no additional durability concerns associated with the treatment.

Tanzanite is best suited for settings in earrings or pendants. While not recommended for daily wear in a ring, with a protective mounting and careful handling, this stone can serve as an attractive special-occasion jewel.

For cleaning, warm, soapy water is the preferred method for tanzanite. Ultrasonic and steam cleaners are never recommended for this gemstone.