Trona
30 in the gallery
Trona is a hydrated carbonate mineral with the chemical formula Na3H(CO3)2·2H2O. It forms as colorless to white, often tabular or prismatic crystals in evaporite environments, and typically displays a vitreous to pearly luster. Commonly associated with other evaporites, its habit and transparency can vary, and crystals may occur as granular masses or delicate aggregates.
- Formula
- Na3H(CO3)2 · 2H2O
- Rarity
- Common
- Stability
- Moderately Stable
- Collector interest
- Moderate Interest
Where Trona is found
About Trona
Notable specimens have been reported from Egypt and the United States, where arid basins and saline lakes foster evaporation a favorable setting for trona formation. In these locales, larger crystals and well-formed aggregates can be found in sedimentary deposits and mine workings, making high-quality pieces sought after by collectors who value evaporite diversity and mineral associations often seen with carbonate systems.
Collectors seek trona for its simple yet elegant habit and its role in understanding evaporite mineralogy. While not rare, well-preserved crystals and attractive associations—especially those showing clear, pale crystals against contrasting host material—are prized for display and study within a broader evaporite suite.