Tanzanite, also known as zoisite, is a silicate mineral. Early on it was used as a decorative material, but since the discovery of transparent blue-violet crystals in Tanzania in 1967, it has become increasingly important in the gemstone industry. Named Tanzanite in honor of the then newly formed Republic of Tanzania, it is also known abroad as Tanquanite.
The stone was first discovered in 1967 in the Arusha region at the foot of the Equatorial Snowy Mountains. It was initially mistaken for peridot, then for bluestone. It was eventually correctly named by a Tanzanian geologist. It is an emerging gemstone recognized worldwide. The unique "Heart of the Ocean" in the movie "Titanic" is Tanzanite.
[Origin].
Tanzanite is found only in Tanzania, East Africa, in the foothills of Mount Kilimanjaro, in an area 4 kilometers long and 2 kilometers wide. It is a gemstone that is both old and young. Tanzanite was formed about 580 million years ago and remained buried deep below 2 kilometers in the earth until 1967 when it became known. It then quickly shot to fame in the international market Top grade and A grade Tanzanite blue market price for each carat of 1500 ~ 2900 U.S. dollars or more, B grade in the 150 ~ 700 U.S. dollars or so. Special production of exquisite varieties, the price is not limited. The movie "Titanic" in the 50-carat "heart of the ocean", the market price of tens of thousands or even hundreds of thousands of dollars, and has been difficult to find.
[color].
Tanzanite's color is polychromatic, usually blue and purple.
V=Violet (Purple) B=Blue (Blue)
Capital B, V stands for the main color, vB (violetish Blue) is the main color of blue, bV (bluish violet) is the main color of violet, the most attractive is its rich, slightly violet tint of blue.
[Grading].
Tanzanite can be categorized according to the level of saturation:
Exceptional Plus (E+)
Exceptional(E)
Vivid (V)
Intense (I)
Moderate (M)
Light(L)
Pale (P)
Depending on the level of clarity, they can be categorized as:
Eye-Clean(EC)
Slightly Included(Sl)
Moderately Included(MI)
Heavily Included(HI)
According to the quality of the cut, it can be classified as:
Excellent
Very Good
Very Good
Fair
Internationally, tanzanite quality is categorized from high to low:
SD, D, 4A, 3A, 2A, A, 6 grades.
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