Paraiba Tourmalines are among the rarest stones in the world, its exceptional “Neon” or “Electric” colors have made it a must-have among gemstone enthusiasts. It stands to reason, then, that this amazing color is what gives the gem its value: the deeper, more saturated and vibrant the color, the more expensive the stone. Greenish Blue stones (those with a blue base and a tint of green) are usually more valuable than Bluish Green stones, although this depends on individual taste. Both are very attractive.