Since tourmaline is a natural crystal, it is affected by various factors in its formation process, and the color of tourmaline will be different. Especially because of the use of his mineral composition, the tourmaline function will also be different, resulting in a level of tourmaline. How is the tourmaline grade divided? What is the standard for dividing the tourmaline level?
Color
It is the key to dividing the tourmaline level: the more pure, intense, and better the color.
Generally, the red tourmaline can be divided into five levels: deep red, red, medium red, light red, and light red. The green tourmaline is divided into five levels: dark green, green, medium green, light green, and light green.
2. Transparency
This is the primary condition for quality tourmaline and an important criterion for reflecting the value of tourmaline.
Under the naked eye, the transparency of tourmaline is generally divided into transparent, translucent, translucent, sub-transparent, and opaque grades. For example, in the case of red tourmaline, only one or two rubies can be called high-quality gemstones. And some red tourmalines on the market, the particles are very expensive but very cheap, because the transparency is not up to the gem level.
3. Cut
The cut determines the fire of the tourmaline, and also determines the value of the tourmaline to some extent. The tourmaline classification of tourmaline can be used as a reference for diamond standards.
4. Clarity
The tourmaline contains a lot of impurities and ice cracks.
Based on the naked eye, the purity of tourmaline can be divided into extremely difficult to see, difficult to see, visible, easy to see, and easy to see. Among them, the first and second grades are high quality gemstones. The high clarity of the tourmaline is extremely rare, and the high quality of the tourmaline can greatly enhance the value of the tourmaline.
5. Quality
According to the quality, the tourmaline grade is divided into 1~2 carats, 3~5 carats, 5~10 carats, and its value is multiplied by 5 carats. Among them, the tourmaline of more than 15 carats is the most popular and the most collectible.
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