Paraíba tourmaline is a rare and exceptionally valuable variety of tourmaline, renowned for its vivid blue-green to turquoise colors and distinctive neon-like glow. What makes this gemstone unique is the presence of copper, and sometimes manganese, within its crystal structure—a rarity in the world of gemstones. The discovery of this variety in the 1980s in the Brazilian state of Paraíba immediately attracted international attention.Paraíba tourmalines are prized not only for their extraordinary color but also for their extreme rarity. They rank among the most sought-after and highest-priced gemstones on the market.

Although the term "Paraíba" originally referred only to tourmalines from the Brazilian state of Paraíba, its use has broadened within the gemstone trade. Today, the name "Paraíba tourmaline" is generally applied to copper-bearing tourmalines with similar optical properties, regardless of their origin.There are three widely recognized sources:

• Paraíba (Brazil) – the original source, producing gemstones with exceptional color intensity and rarity.
• Mozambique – produces copper-bearing tourmalines that closely resemble Brazilian material, often in larger sizes.
• Nigeria – another important source of vividly colored Paraíba-type tourmalines, sometimes displaying slightly less pronounced fluorescence.

The very first Paraíba tourmaline was discovered in 1989 at the Batalha Mine in the Brazilian state of Paraíba. Its extraordinary rarity and remarkable color quickly made it legendary. As supplies from Brazil became increasingly scarce, similar copper-bearing tourmalines from Mozambique and Nigeria began to be marketed as "Paraíba tourmaline" from the early 2000s onward, provided they exhibited the same chemical composition and visual characteristics.This broader definition is recognized by most gemological laboratories, as long as copper (Cu) is confirmed as the primary coloring element.

Paraíba tourmalines are sometimes treated to enhance their color or clarity. The most common treatments include:

• Heat treatment – frequently used to reduce unwanted green or brownish tones and enhance the gemstone's vivid blue or turquoise color.
• Fracture filling – in rare cases, small fractures are filled with colorless substances such as resin. This treatment is less common for Paraíba tourmaline than for many other gemstones.

Reputable gemological laboratories can determine whether a gemstone has been treated. Untreated specimens with vivid natural color are exceptionally rare and highly valuable.

The value of a Paraíba tourmaline depends on several factors, including color, origin, clarity, treatment, and carat weight. The most desirable gemstones include:

• Neon blue or turquoise Paraíba tourmaline from Brazil – displaying exceptional color intensity and strong fluorescence.
• Untreated gemstones – featuring vivid natural color without any form of enhancement.
• Top-quality Mozambique Paraíba tourmaline – often available in larger sizes while exhibiting color comparable to Brazilian material.
• Transparent gemstones with exceptional clarity – especially in larger carat weights, these are extremely rare and highly prized.