The classification of tanzanite, what are the classification of tanzanite?
With the popularity of the jewelry market, the price of colorful treasures including tanzanite has soared in recent years. Nowadays, there are more and more people who like colorful treasures. In order to improve everyone's awareness of colorful treasures, the following Chinese jewelry investment network Xiaobian brings you the tanzanite classification and tanzanite identification. Knowledge, I hope that everyone can correctly identify the level of tanzanite when purchasing.
Tanzanite classification
The internationally accepted tanzanite grade is based on 4C, which is divided by color, clarity and cut and carat weight. Therefore, the higher the overall value, the higher the price of tanzanite.
1, color
The color of tanzanite includes blue, yellow-green, magenta, purple or colorless. The highest quality tanzanite color is rich and natural blue. The tanzanite purple tone is too obvious, and its price is slightly lower.
2, clarity
Tanzanite with the same color and higher clarity is more valuable. The clarity of tanzanite is determined by the enthalpy contained in the interior, usually between the naked eye and the sputum.
3, cut
Tanzanite has a hardness of 6.5-7. Therefore, it is designed to be able to polish a variety of enamel-type ornaments. Generally, when choosing tanzanite jewelry, the thickness of the tanzanite jewelry is moderately thick and the fire is bright and symmetrical. It is better. Combine factors such as color, clarity and cut-off, and try to choose tanzanite with a large number of carats.
Tanzanite level identification
The Gemological Institute of America (GIA) has a tanzanite color of 10 grades and a saturation grade of 6 grades. The tanzanite level is mainly identified based on the following points:
1. VVS means that the naked eye can't see ç‘•ç–µ or close to flawless, and there is no defect on the surface. Only a 10 times magnifying glass can see a very small amount of inclusions or defects.
2, VS refers to the naked eye is difficult to see ç‘•ç–µ, a small amount of inclusions or defects can be seen under a 10x magnifying glass, and has no effect on the transparency and appearance of tanzanite.
3. SI means that a small amount of cockroaches can be seen by the naked eye, but the effect on the appearance of tanzanite is not significant.
4, I1-I2 means that the naked eye can see more inclusions, and has a great influence on the appearance and transparency of the tanzanite.
5, I3 means that the naked eye can easily see a lot of inclusions and defects, which has a serious impact on the appearance and durability of the stone.
Based on the above content, when choosing tanzanite, the first consideration should be the color of tanzanite. If the blue is thick and translucent, then the price is naturally high. In addition, the regular shape of tanzanite, such as round and square tanzanite is more suitable for jewelry, while the triangular and diamond-shaped tanzanite is less expensive, tanzanite is not the more odd the shape, the higher the value.
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