How to choose a good tourmaline? It should be considered mainly in terms of color, transparency, clarity, weight, and cut.
1. Color: Among the single color, the tourmaline with bright colors such as red, rose, green and sky blue is the best, pink and yellow are the second, and colorless is the second. In addition, the more single crystals, the better, such as two-color tourmaline, three-color tourmaline and so on.
2. Transparency: Tourmaline requires crystal clear, the more transparent the better the quality, do not have obvious fog or opacity. In some of the crystals of tourmalines, there are many needle-like inclusions that have cat-eye effects, and the green color tourmaline is the most common. The value of the tourmaline, which has this cat's eye effect, will increase, but the key to the evaluation lies in the vividness, transparency and block size of the color, as well as the color change effect. The obvious change of the tourmaline is very rare, so it is of high value and is the collector's collection target.
3. Clarity: Clarity refers to the amount of impurities and strontium inside the tourmaline. The less impurities and strontium inside the tourmaline, the higher the price, and the tourmaline containing cracks and gas-liquid inclusions is often used as a jade carving material.
4. Weight: The same quality of tourmaline, the higher the weight, the higher the price.
5. Cut: The cut should be regular, the ratio is symmetrical, and the polishing is good, otherwise it will affect the value.
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