Fig. Par09 Examples of faceted “Paraiba”- tourmalines from the Batalha mine (State of Paraiba, Brazil) are shown. The colors of valuable “Paraiba”-tourmalines are vibrant greenish-blue colors that are described as “neon”-blue colors in the trade. All shades of transition of from green to blue can be found. Largest sizes are 11-12ct. Picture P. Wild Archive, Idar-Oberstein (Germany).
Fig. Par10 Example of a large-sized “Paraiba”- tourmaline rough with typical "neon"-blue color (from the Quintos mine, Rio Grande do Norte). The tourmaline section has been cut perpendicular to the c-axis and polished on both sides.
Copper-Bearing Tourmalines from Brazil
