Copper-bearing tourmaline was first found in the Brazilian state of Paraíba in the late 1980s, and the name now covers stones of the same chemistry from Mozambique and Nigeria as well. What sets them apart is the glow. Copper produces a saturated turquoise to neon blue that appears lit from within, even in soft light. This pear has that effect in a clear, slightly greenish blue.
The stone has been heated, which is standard for Paraíba tourmaline and removes purple or grey tones to reveal the blue. The GRS report confirms copper and manganese, the chemistry required for the Paraíba name, and Mozambique origin. It is slightly included, with small fluid inclusions visible under magnification. Clean Paraíba stones are rare, and some inclusion is accepted in the trade.
Under a carat, a Paraíba is usually worn as the centre of a pendant or a ring with a diamond halo, which makes the blue look even brighter. Tourmaline is fine for rings with reasonable care.

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