IMA Updates Mineral Naming Guidelines

The International Mineralogical Association on New Minerals, Nomenclature and Classification (CNMNC) released Newsletter 92, which details updated rules for naming and classifying newly discovered minerals. The document appears in the European Journal of Mineralogy, volume 38, pages 491–495, published in 2026 ¹.

Authored by Ferdinando Bosi, Frédéric Hatert, Marco Pasero, and Stuart J. Mills, the newsletter reviews recent additions to the mineral database and proposes refinements to existing nomenclatural conventions. It emphasizes consistency across international databases and clarifies criteria for distinguishing between polymorphs, solid solutions, and composite phases.

Key changes include a revised hierarchy that places greater emphasis on crystallographic data over chemical composition alone when assigning new species names. These updates aim to reduce duplication and improve reproducibility in mineral identification.

For collectors and researchers, the new guidelines mean that many previously ambiguous specimens will now receive definitive classifications. This clarity benefits both academic studies—where precise terminology underpins comparative analyses—and commercial markets, where accurate labeling can affect valuation and provenance claims.

The article notes that while the core principles remain unchanged, the practical application of these rules will evolve as more complex materials are encountered. In particular, the association highlights challenges posed by nano‑scale minerals and mixed‑phase assemblages commonly found in metamorphic terrains. By addressing these issues head‑on, the CNMNC seeks to keep classification standards aligned with advances in analytical techniques such as synchrotron X‑ray diffraction and electron microprobe analysis.

In summary, Newsletter 92 provides an updated framework that balances scientific rigor with operational practicality. Its adoption is expected to streamline communication among geoscientists worldwide and enhance consistency across museum collections, research institutions, and industry suppliers.