Anyone who knows about gems has heard of tourmalines, but few people have seen the king of the tourmaline - Paraiba Tourmaline. Paraiba Tourmaline is a model of Brazilian gems, a gem of the world's gemstones.
What is Paraiba Tourmaline?
Paraiba tourmaline is a kind of tourmaline, compound boroic acid with a specific gravity of 3.06, a refractive index of 1.62-1.64, a birefringence of 0.018, a Mohs hardness of 7-7.5, and a composition of various metal elements such as copper and manganese. Trigonal/hexagonal crystal system, no cleavage, staggered or shell-like fracture, glass luster, purine array purification.
The team led by the gemologist Heitor Dimas Barbosa in 1989, after years of exploration and excavation, was discovered in the state of Paraiba in Brazil and was named Paraiba.
Color secret
Brazil is the most typical place of production of tourmaline. In this very famous family of rainbow gemstones, there has been a long absence of a color: bright Turkish blue-green. Until it was discovered in Paraiba, Brazil.
Usually a very small amount of iron, manganese, chromium, vanadium gives the tourmaline such a beautiful and varied color. But for ParaÃba Tourmaline, it is completely different: it is the copper element that makes the Paraiba tourmaline have a very distinctive color. And this element has never appeared in any tourmaline before. In addition, scientists have also found that it also contains manganese.
The combination of copper and manganese creates a very beautiful and fascinating range of colors: emerald green, Turkish blue to sky blue, sapphire blue, indigo, deep purple and fuchsia. Of course, the mixing of these two elements may also result in the production of light gray to purple blue. The high concentration of copper is the main cause of the very bright and dazzling neon, blue and green, Turkish blue and green. On the contrary, purple and red are caused by manganese. With heat treatment, an experienced gem cutter can eliminate these red parts, leaving only the crystal color of the beautiful copper.
The lively and vivid colors of Paraiba are only fully visible after cutting. When it is cut and carved, it exudes a very unique fire and dazzling light, even if only a slight light illuminates it. Therefore, people call this color "electric blue" or "neon blue". The distinctive and vibrant character makes this treasure of nature a fascinating and attractive attraction. The unique and vivid color of Paraiba Tourmaline is a vivid epitome, and even an amateur can easily distinguish its characteristics.
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