Identification:
Gemstones similar to tourmaline mainly include pink topaz, red spinel, andalusite, green sapphire, and green diopside. Similar gemstones can be distinguished by their refractive index and density.
The identification characteristics of tourmaline are significant pleochroism. When the gemstone is turned, the naked eye may see color changes in different directions; high birefringence, which makes the ghosting of the back facets obvious; unique pyroelectricity , with electrostatic dust collection phenomenon.
Tourmaline is called ---- tourmaline in China, which is transliterated from the English name "tourmaline". Its craft name is "tourmaline", which is characterized by boron-containing Al, Ring-structured silicate minerals of Na, Fe, Mg, and Li rank among mid-range gemstones.
The crystal structure and morphology of tourmaline are trigonal. Complex trigonal single pyramidal crystal type. The crystals are columnar. The crystal faces at both ends of the crystal are different, vertical lines often appear on the cylinder, and the cross-section is spherical and triangular. The aggregates are rod-shaped, radial, and needle-shaped, and may also be dense blocks or cryptocrystalline blocks.
Extended information:
Origin of tourmaline stone:
According to legend, if you can find the foothold of the rainbow, you can find eternal happiness and wealth. Rainbow Although it often exists, its starting point can never be found. It wasn't until 1500 that a Portuguese exploration team discovered a gemstone in Brazil that actually shone with colorful neon light!
It was like a rainbow shooting from the sky to the center of the earth, and ordinary stones bathed in the rainbow were walking along the way. It has acquired all kinds of colors in the world and has been refined and crystal clear. Not all stones are so lucky. This gem hidden at the foot of the rainbow is called "Tourmaline" by later generations, and is also known as "the rainbow falling into the world."
Reference: Tourmaline Tourmaline-Baidu Encyclopedia