Paraiba Tourmaline
Paraíba Tourmaline — Distinctive Blue and Green
Paraíba tourmaline is known for vivid blue and green colours, often described as “neon” or “electric”. Fine stones combine strong saturation with a bright appearance, giving them a striking presence even at modest sizes.
Although Paraíba belongs to the tourmaline group, we have dedicated a separate page to it because of its exceptional colours, composition and distinctive place in the world of gemstones.
Gemmological Properties
| Mineral | Copper-bearing tourmaline, usually elbaite |
|---|---|
| Composition | Complex boron-bearing silicate; copper and manganese are important trace elements |
| Colours | Blue, greenish blue, bluish green and green, subject to gemmological criteria |
| Hardness | 7–7.5 on the Mohs scale |
| Refractive index | Commonly around 1.62–1.64; composition-dependent |
| Specific gravity | Usually around 3.06 |
| Phenomena | Double refraction and pleochroism; rare chatoyancy |
These properties overlap with other tourmalines. Routine measurements alone cannot establish copper content or confirm the Paraíba designation.
The Name and Its Meaning
The name comes from Paraíba state in Brazil, where these stones were discovered in the late 1980s.
The trade and gemmological designation also applies to stones meeting the relevant composition and colour criteria from other sources, including Nigeria and Mozambique. “Paraíba” and “Brazilian origin” therefore describe different information and should be stated accurately.
Colour and Optics
Copper contributes to blue and green colours, while manganese can influence additional colour components. Neither copper content alone nor a blue-green appearance automatically qualifies a tourmaline as Paraíba.
“Neon” describes the visual impression of the colour; it does not mean that the gemstone produces its own light.
Quality and Price
Colour is central to Paraíba valuation. Clarity, cutting, size, treatments and substantiated origin information also matter.
Fine stones can command very high prices, but the name alone does not establish quality. Inclusions do not necessarily prevent a stone from being attractive; their effects on appearance and suitability for setting must be considered.
Treatments and Identification
Heating can reduce pink or purple colour components and develop blue-to-green colours. Heat treatment is not always detectable.
Some stones undergo clarity enhancement through fracture filling. Treatments should be assessed and disclosed according to the evidence, rather than assumed to be identical in every stone.
Paraíba identification combines gemmological testing with suitable analysis of copper and the causes of colour. A “neon” appearance alone is insufficient, and glass imitations also exist.
Suitability for Setting
Paraíba can be used in pendants, earrings and rings when the design suits the individual stone. Fractures, inclusions and exposed edges should be assessed before selecting a setting.
White or yellow gold can complement its colour, depending on the particular shade and design. Stones with significant fractures require especially careful planning.
Paraíba at TzurGems
At TzurGems, Guy, a gemologist, and Rafael, an artisan goldsmith, combine gemmological selection with personal jewellery design that gives the gemstone’s distinctive colour room to stand out.
Sources Around the World
Familiar Paraíba tourmaline sources include Brazil, Mozambique and Nigeria. The name also applies to African material meeting the relevant composition and colour criteria, so it does not necessarily indicate Brazilian origin.