Ingredients/Composition - ig.loss 43.49% (loss on ignition) - SiO₂ 1.25% (silicon dioxide) - Al₂O₃ 0.08% (aluminum oxide) - CaO 54.33% (calcium oxide) - Fe₂O₃ 0.07% (ferric oxide / iron(III) oxide) - K₂O 0.01% (potassium oxide)