GIA 2.50 ct. Paraiba Tourmaline & Diamond Ring in 18K White GoldABOUT THE ITEM Paraba tourmaline is an exceptionally rare type of tourmaline prized for its vivid, neon like bluish green hues. In 1988, gem miners in Paraba, Brazil, uncovered intensely saturated blue and green tourmalines unlike anything previously seen. Their extraordinary color is caused by trace amounts of copper, often accompanied by manganese. Since this initial discovery, copper bearing tourmalines with similar colors have also been found in