Experts posit that only one Paraiba tourmaline ... and vibrant gemstones I have ever seen.” Likewise, gemmologist and founder of Minka Jewels Lucy Crowther counts blue-green tourmalines as ...

What gives gemstones colors ... The presence of iron and titanium can give tourmaline shades of blue and green, while manganese can produce pink, red, and sometimes brown colors.

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