In the world of gemmology, the South American country of Brazil plays host to a variety of precious gemstones.
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On the trail of the Paraiba tourmaline: In search of one of the world's rarest gemstones“Their unique turquoise blue-green hue ... The tourmaline’s name is derived from the Brazilian state of Paraiba, where small deposits were discovered in the late 1980s. Its vivacious colour ...
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