For decades, the electric glow of Paraíba tourmaline has captivated collectors, designers and gem lovers alike. Now, an exciting new discovery in Ethiopia is adding a fresh chapter to the story of one of the world's most coveted colored gemstones.
The Swiss Gemmological Institute SSEF recently confirmed credible reports of a new deposit of copper-bearing tourmaline — the variety known in the trade as Paraíba tourmaline. The find is especially intriguing because preliminary testing shows the Ethiopian gems share a chemical signature remarkably similar to the most prized Paraíba stones from Brazil.
That similarity is both exciting and challenging.
SSEF scientists are now actively refining their trace-element analyses and origin-determination algorithms to distinguish Ethiopian Paraíba tourmalines from their Brazilian and African counterparts with greater precision. In some cases, the overlap is so significant that geographic origin remains inconclusive, highlighting just how closely related these gems are.
Paraíba tourmaline first burst onto the jewelry scene in the late 1980s when Brazilian prospector Heitor Barbosa uncovered vivid blue crystals in a weathered pegmatite near the village of São José da Batalha in the state of Paraíba.
What he discovered was unlike anything the gem world had ever seen.
Paraíba tourmalines are celebrated for their electric, almost neon glow — a dazzling blue to bluish-green color often compared to tropical waters or even the bright hue of glass cleaner. The vivid coloration comes from trace amounts of copper within the crystal structure, sometimes enhanced by manganese, creating an internal radiance that seems to glow from within.
The gems immediately became a sensation. Their intense color, combined with their rarity, sent prices soaring and established Paraíba tourmaline as one of the most desirable colored gemstones on Earth.
Production from the original Brazilian mines was limited, prompting excitement when additional deposits were discovered in Nigeria and Mozambique in the early 2000s. Mozambique, in particular, emerged as an important supplier, producing larger quantities of gem-quality stones and occasionally yielding spectacular specimens weighing hundreds of carats.
Now Ethiopia joins that exclusive club as the fourth major source.
The discovery could eventually increase availability, but rarity remains part of Paraíba's mystique. Only a small percentage of the rough is considered gem quality, ensuring that fine examples remain highly sought after.
Beyond its beauty, Paraíba tourmaline is also practical. Ranking 7 to 7.5 on the Mohs scale of hardness, it's durable enough for everyday jewelry, from rings to pendants. It's also one of October's two official birthstones, sharing the honor with opal.
Credit: A selection of copper-bearing tourmalines from Brazil, Mozambique and Nigeria, and two additional samples (two oval stones on the bottom left of the image) analyzed recently at the Swiss Gemmological Institute, which based on preliminary data possibly originate from the newly reported source in Ethiopia. Photo: © SSEF.