Tanzanite

Price

Retail price for top color tanzanite:

Carat size from large to small

5 carats plus: $75-$1500/ct

1-3 carats: $75-$1200/ct

0.5-1 carat: $75-$500/ct

Main origin

The Merelani Hills in northern Tanzania is the only location where commercial mining of tanzanite takes place.

Imitation

Coranite – synthetic blue corundum, tanavyte – purple YAG, glass

Synthetic blue corundum

Blue glass

Quality factors

Color
The most valuable colors of tanzanite are deep, saturated violet blue or blue violet. The most sought-after shade is a slightly violet blue, as tanzanite was initially used as a less expensive alternative to sapphire.

High quality tanzanite with vivid blue color

Low quality tanzanite with blue violet color

Clarity
Eye-visible inclusions can decrease the value of tanzanite.

Cut
There are no standard cuts for tanzanite, and the most common cuts are oval and cushion cuts. Deep cuts can enhance the gem’s tone.

Carat weight
Tanzanite comes in different sizes, shapes, and faceting styles. The richest and deepest colors are typically found in stones that weigh over 5 carats. On the other hand, smaller stones tend to have less vivid colors.

Care & Cleaning

Cleaning

The best way to clean tanzanite is with warm, soapy water.
Ultrasonic and steam cleaners are not suitable for tanzanite.

Care

Avoid exposing tanzanite to high temperatures or sudden temperature changes.
Protect tanzanite from hydrochloric and hydrofluoric acids.
To ensure the best protection for your tanzanite, set it in earrings or pendants and secure it in a protective setting.

History and Lore

Tanzanite is a rare gemstone that is found only in the Merelani Hills of Tanzania and was discovered in 1967 by Manuel de Souza. The gemstone was named tanzanite to honor its country of origin.
Tiffany & Co recognized the potential of tanzanite and made efforts to promote it through a major advertising campaign in 1968. Tanzanite became popular due to its vivid colors, high clarity and the ability to cut it into large stones.