In a significant development for the gemology world, the Gemological Institute of America (GIA) and the Gübelin Gem Lab have each independently confirmed Ethiopia as a novel source for copper-bearing tourmaline, aligning with the established definition of Paraíba tourmaline. This groundbreaking announcement follows rigorous, separate investigations conducted by both esteemed laboratories, utilizing their own acquired reference samples to reach their conclusions.

The first hints of copper-bearing tourmaline emerging from Ethiopia began to surface within the gemstone trade earlier in 2026. The Gübelin Gem Lab encountered these unique specimens in early May 2026, noting that their chemical composition diverged from existing data associated with Brazilian, Mozambican, or Nigerian sources. Promptly, the lab amassed a collection of approximately 300 rough and cut stones from various independent suppliers, supplementing this with material personally gathered during a field visit to Ethiopia by a senior Gübelin gemologist.

Concurrently, GIA gemologists initiated their examination of gemstone parcels believed to originate from Ethiopia in early June. By July, the Ferreira Group provided over 100 rough and faceted samples to GIA’s research division in Carlsbad, California, for an in-depth scientific analysis. The Ethiopian tourmaline is characterized by its copper-driven coloration, exhibiting a spectrum of hues from blue and bluish-green to violet, purple, and even colorless varieties. Many of these stones also display noticeable color zoning. Both laboratories’ analyses consistently revealed elevated concentrations of vanadium (exceeding 60 ppm), lead (ranging from 170 to 6,000 ppm), and gallium (between 280 and 900 ppm). These distinctive chemical characteristics are readily detectable using a high-quality ED-XRF system.

Dr. Peter Tollan, the Head of R&D at the Gübelin Gem Lab, remarked on the material’s unique chemical signature: “Despite significant and intricate chemical variations among individual samples, they collectively possess a remarkably distinct and consistent compositional fingerprint. This enables easy differentiation of Ethiopian samples from Paraíba tourmaline sourced elsewhere, without requiring advanced analytical techniques like LA-ICP-MS.” Dr. Aaron Palke, a GIA senior research manager, further affirmed the discovery’s impact, stating, “We can confidently designate Ethiopia as an origin on GIA Tourmaline Identification and Origin Reports. We have thoroughly documented the material’s characteristics, thereby enriching GIA’s comprehensive database of colored stone origin information.”

Both institutions plan to publish their complete findings in an upcoming edition of GIA’s quarterly journal, Gems & Gemology. They will also continue to augment their reference collections as more material becomes available. The criteria for defining Paraíba tourmaline in these investigations adhere to the terminology established by the Laboratory Manual Harmonisation Committee (LMHC).

This discovery marks a pivotal moment for the global gemstone market, introducing a new, verifiable source of highly prized Paraíba tourmaline. The distinct chemical properties of the Ethiopian material not only aid in its identification but also contribute invaluable data to the ongoing understanding of tourmaline genesis and geographical distribution. The collaborative and independent efforts of GIA and Gübelin Gem Lab underscore the rigorous scientific standards applied in authenticating such significant finds, ensuring the integrity and transparency of the gemstone trade.