Paraíba Tourmaline Value, Price, and Jewelry Information ...
The compound crusher is used to crush a variety of medium hard ores, such as limestone, clinker,coal and other ores, which can be widely used in mining, metallurgy, refractory, cement, coal,glass, ceramics, electric power and other industries, and is one of the commonly used equipment in the crushing production line and the sand making production line. This series of crusher is a new product based on our company's PEL vertical compound crusher and optimized with domestic and foreign fine crushing technology. Its performance has reached the domestic advanced level. It is mainly for all kinds of ore with compressive strength not exceeding 200MPa and water content less than 15%.
Tones range frommediumlight tomediumdark. Chrome tourmalines are the only other tourmalines that approach a comparable saturation level (5). However, these gems have a higher RI, 1.772 to 1.778, and a much lower birefringence, 0.006. So, if you find an elbaite tourmaline with a saturation level of 5 or higher, you most likely have a paraíba.