Gypsum Caves: Gypsum Caves, also known as gypsum karst caves, sort throughout the dissolution of gypsum by groundwater. As marginally acidic drinking water percolates as a result of gypsum-rich bedrock, it progressively dissolves the gypsum, building underground voids and passages. Gypsum board would be the technological product or service name https://www.propanraya.com/id/produk/eco-gypsum-ee-4050