Tourmaline is the technological name of tourmaline. It is a kind of jewel grade tourmaline in the tourmaline family. It is a borosilicate crystal containing aluminum, iron, magnesium, sodium, lithium, potassium and other chemical elements, with a variety of colors.
The mineralogical name of tourmaline is tourmaline, which is called "arsenic selenium", "tourmaline", "bixiaxi", "broken evil gold", etc. in some historical documents in China. The crystal of tourmaline is a complex triangular columnar crystal, and the characteristic growth stripes parallel to the extension direction of the columnar crystal will appear on the crystal surface. In cross section, it is spherical triangle with arc surface. Its composition is complex, and its color is also complex and changeable. The international jewelry industry basically classifies tourmalines into commercial varieties according to their colors. The more colorful the color, the higher the value. Attention should be paid to color, transparency and purity when purchasing.
In China, the word "tourmaline" first appeared in the Qing Dynasty. In some historical works after the Qing Dynasty, names such as "tourmaline", "bixiaxi", and "xilingshi" have also been found. In modern society, people call this strange gem "tourmaline". Tourmaline is one of the materials for the first and second grade officials to wear flower feathers, and it is also used to make the court beads they wear.
Brazil is the best place of producing tourmaline in the world. The tourmaline produced here is colorful. Up to now, there have been more than 20 kinds of colors mined, almost including all the colors of tourmaline. Generally, the international jewelry industry divides the tourmaline into commercial varieties according to color. The more colorful the color, the higher the value.
In addition to its rich and colorful colors, tourmaline is most attractive because of its multicolor. When we hold the tourmaline and rotate it against the light, and observe it from different angles, the color tone and depth of the tourmaline will change with the observation angle.