Nearly two centuries ago, zoisite was only used as a decorative stone in a few areas; So in A.D. 1967, many jewelers and mineralogists broke their glasses. Unexpectedly, zoisite, which has always been humble, has such a beautiful and unique blue-purple variety-Tanzanite. 1967, Louiscomforttiffany, a jeweler of Tiffany Company in new york, showed this newly discovered gem "Tanzanite" to the world for the first time. It is believed that the first person who discovered this gem was a Massai herdsman in Arusha, northern Tanzania. According to legend, one day a flash of lightning struck the area near the Mellani Mountains at the foot of Kilimanjaro volcano, and set fire to the surrounding grass. Later, when Madzar -e herders drove their cattle back to this place, they found many stones shining blue and purple on the ground in the sun, so herders picked up these gems-Tanzanite, which was regarded as the earliest collector of Tanzanite. In fact, there is another hero behind the scenes who really showed the world Tanzanite. He is a Portuguese geologist De! When he went to this area, he noticed this dazzling blue-purple gem and helped Tiffany introduce this amazing discovery to the world two years later. When he went to this area, he noticed this dazzling blue-purple gem and helped Tiffany introduce this exciting discovery to the world two years later.

At first, this beautiful gem was called "Blue zoisite" in the jewelry industry. However, this name sounds quite similar to the English word "suicide", so LouisComfortTiffany suggested changing it to "tanzanite" to commemorate the place where the gem was found, that is, the newly established United Nations in Tanzania. Since then, people have been using tanzanite.

Tanzanite can be said to be a gift from God to the Tanzanian people! Up to now, Arusha, Tanzania is still the only tanzanite supplier in the world. Kenya, which is also in Africa, has few mineral resources, but it lacks the value of commercial exploitation because of its scarcity.

In fact, tanzanite is a kind of zoisite containing trace vanadium (V), and the vanadium content is about 0.02 ~ 2%. Due to the change of trace element content, the color of tanzanite is unique, ranging from purple to indigo, with many colors. If you look at the top tanzanite from different directions, you can also see the changes of purple, yellow, green and deep blue. Generally speaking, tanzanite with a slight green or brown color can be transformed into a bright blue-purple gem by heat treatment-heating to about 500 degrees Celsius. However, because the hardness of tanzanite is not high, only Mohs hardness is 6.5~7, so ultrasonic vibration cleaning is not allowed when maintaining jewelry. In addition, gems are not allowed to undergo strong temperature changes or come into contact with acidic solutions.