Gem-name guide / Gem variety

Thomsonite

NaCa₂(Al₅Si₅)O₂₀·6H₂O

Thomsonite is indexed as a gem variety in this gem-name directory. The CIBJO nomenclature table associates this name with Thomsonite. Gem names may describe appearance or a material family; a name alone does not identify treatments, origin or quality.

Material or mineral family: Thomsonite-Ca
Name classification: Gem variety

Explore the mineral record

Open Thomsonite-Ca record →

Read the gemological source ↗

Names describe materials, not the authenticity, treatment, provenance or quality of a particular specimen. Physical properties vary for mixed materials; values absent from this guide have not been estimated.

Reference snapshot: September 2026. Source dates and uncertainties are retained in the record.