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Paraiba is one of those gemstone that comes in every colour of the rainbow, and multicolour. The rarest colour would have to be the neon blues of paraiba tourmaline. The original find was made in Brazil, but recently similar material has been coming out of Mozambique. Many dealers still call this Paraiba Tourmaline is a gemstone which has been popular since the days of the Roman Empire.Tourmaline belongs to the three sided crystal system and occurs as long, slender to thick columnar crystals that are usually triangular in cross-section. No other common mineral has three sides. This mineral group is chemically one of the most complicated groups of silicate minerals.