Tanzanite cut 6.69ct, certificate, Tanzania

Tanzanite is a brown-green, blue to blue-violet gemstone variety of the mineral zoisite, a mineral from the sorosilicate group.

Tanzanite is a purple-blue gem named after Tanzania, where its only site in the world lies. The site is located near the town of Arusha near the volcano Mount Meru, about 50 km as the crow flies southwest of the foot of the Kilimanjaro massif. In addition to the beautiful color, its important property is trichroite (different shades of color depending on the orientation of the crystal). Among the precious stones is one of the younger ones. Commonly found tanzanites have a light blue, light purple or brown-green color. Dark blue, rich color is achieved by heating the stone. However, this modification does not reduce the value of the stone among gemologists. Today, all brightly colored gemstone tanzanites are considered fired.

The name tanzanite was first given to him by the famous jeweler Tiffany, who also declared it to be the most beautiful blue stone discovered in the last 2,000 years.
Tanzanite is referred to as the jewel of the 20th century