Chabazite is a tectosilicate mineral of the zeolite group, closely related to gmelinite, with formula (Ca,Na₂,K₂,Mg)Al₂Si₄O₁₂·6H₂O. Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation.