Vivid blue, green, and purple-to-violet cuprian elbaites, renowned in the gem trade as “Paraíba” tourmalines, continue to be recovered in small amounts from northeastern Brazil. Since the initial ...

Discovered in Brazil in the 80s, these stones are bringing new colour to high jewellery collections I n September a cushion-shaped 5.44-carat Paraiba tourmaline ring flew past its US$60,000 upper ...

This stone does not react to fluorescent light ... This is the first time GIA’s Carlsbad lab has examined flame-fusion synthetic sapphire with a color similar to Paraíba tourmaline.

A Polícia Civil da Paraíba, por meio da Delegacia de Roubos e Furtos de Campina Grande (DRF-CG), realizou nessa terça-feira ...