Tourmaline is more precious in red and blue, and yellow and green are more common. In the choice of tourmaline jewelry, red, blue and green are the best, and the colors are required to be uniform and gorgeous;
2. Transparency.
Tourmaline requires crystal clear, the more transparent, the better the quality, and there can be no obvious fog or opacity;
3. purity.
Tourmaline is fragile and prone to cracks. It also contains a lot of inclusions. The existence of a large number of cracks and inclusions will affect the transparency, color and fire color of tourmaline, and the tourmaline with very pure interior is also rare and belongs to the top grade. When choosing, try to choose the one that is clean inside.
4. Pay attention to the selection of tourmalines with special properties.
Tourmaline is rich in color, and two or more colors appear on the same tourmaline, that is, two-color tourmaline or multi-color tourmaline, and the watermelon tourmaline with infrared green inside is also more precious; In addition, tourmaline cat's eye belongs to the top grade of tourmaline.
Extended data:
Maintenance of tourmaline:
1. When you don't wear tourmaline jewelry at ordinary times, put tourmaline jewelry in the jewelry box alone. Don't let tourmaline jewelry and other jewelry collide with each other, causing unnecessary losses.
2. The hardness of tourmaline is 7-8, which is relatively high, but tourmaline itself is brittle and afraid of breaking. Unless it is pure and flawless tourmaline, try not to wear tourmaline gems for strenuous exercise or heavy work, so as not to cause tourmaline gems to break.
It is a good habit to check and repair jewelry regularly. Go to a professional jewelry store to check tourmaline jewelry every month. If you find that the gem falls off or is scratched, solve it in time.
4. If tourmaline jewelry is borderless inlaid and micro-inlaid, avoid collision when wearing tourmaline jewelry, because the tourmaline jewelry inlaid in this way is beautiful, but not very strong, so be careful.
5. Do not use high-temperature water for cleaning for a long time. If it is too hot, tourmaline will change color.
Baidu Encyclopedia _ tourmaline