This 3.28-carat Paraíba tourmaline's vivid violetish blue hue rivals the finest sapphires. Because of this tourmaline's rarity, its per-carat price is also likely to rival the price of fine sapphire.

It forms in a wide variety of rock types. It’s rarely used as a gem, although it has been featured in mourning jewelry. Tourmaline’s colors have many different causes. It’s generally agreed that ...

In September a cushion-shaped 5.44-carat Paraiba tourmaline ring flew past its US ... is their distinctive neon or electric greenish-blue colour, which is unique among gemstones,” said Chin.