The composition of tourmaline is very complex, so its color is rich and varied. The international jewelry industry usually divides tourmaline into commercial varieties according to its color. Generally speaking, the brighter the tourmaline, the higher its value.

Red tourmaline-the most precious (red, purple, rose), followed by pink. It should be noted that red tourmaline, which is as red as ruby and has independent Chinese and English names, is called the best among red tourmalines; Green tourmaline-chrome green tourmaline, followed by yellow-green tourmaline; Blue tourmaline-the price of high quality is similar to that of sapphire, followed by light blue; Pure yellow or orange tourmaline-rare, canaries are more expensive; White tourmaline and black tourmaline are too dark, and the color difference is cheap.

There is also a kind of tourmaline with cat's eye effect, which doubles the value of high quality. In addition, a very rare variety of tourmaline-watermelon tourmaline, named after watermelon, is pink in the middle and green in the edge. Is a rare darling of the international trading market!

Step 2 be clear

As an ordinary consumer, when buying tourmaline, if you don't use instruments and equipment to identify the goods, then the most direct way is to observe with the naked eye. Observing the purity of precious stones is a method that many precious stones will use in identification. This is a sign that a gem is produced in the process of generation, which can often directly reflect some situations of the gem.

Natural tourmaline crystals often contain many inclusions or inclusions, some of which can be observed with naked eyes if carefully observed, but it is necessary to distinguish the types of inclusions with a magnifying glass. There are three types of inclusions: gas-liquid, tubular and parallel. There are few tourmalines that really achieve complete purity, and the value is very high. After tourmaline is filled, typical filling features can be seen, such as cracks or cavities, occasional bubbles, and "flash effect" can be seen along the cracks.

3. The size of tourmaline

Tourmaline, like all precious stones, is harder to find as it gets bigger. The heavier the tourmaline of the same quality, the higher the price. At present, tourmaline with large volume and high purity is rare in the market, which belongs to extremely rare top grade and can not be met.

Cut work

The so-called cutting refers to the accuracy of cutting and grinding ratio and the perfection after finishing. While achieving the accuracy of these data, we must also ensure the maximum size of tourmaline. At present, Thailand, Brazil and Germany are popular in the market, and the added value of different countries is different.

In recent years, De-cut gemstones have attracted more and more attention and love from domestic jewelry lovers. Knowledgeable friends know that compared with other countries, German technology has the characteristics of "rigorous and accurate modeling and straight cutting lines".

5. Flame color