Gypsum Caves: Gypsum Caves, often known as gypsum karst caves, variety with the dissolution of gypsum by groundwater. As a little acidic drinking water percolates as a result of gypsum-rich bedrock, it gradually dissolves the gypsum, making underground voids and passages. Gypsum board would be the specialized product or service https://www.propanraya.com/id/produk/eco-gypsum-ee-4050