Gypsum Caves: Gypsum Caves, also known as gypsum karst caves, kind with the dissolution of gypsum by groundwater. As somewhat acidic drinking water percolates through gypsum-abundant bedrock, it little by little dissolves the gypsum, creating underground voids and passages. Reactivity: It's chemically secure under ordinary problems but reacts with sulfuric https://www.propanraya.com/id/produk/eco-gypsum-ee-4050