Gypsum Caves: Gypsum Caves, generally known as gypsum karst caves, variety with the dissolution of gypsum by groundwater. As a bit acidic water percolates by means of gypsum-loaded bedrock, it progressively dissolves the gypsum, making underground voids and passages. Gypsum normally takes up to a few months to break up https://www.propanraya.com/id/produk/eco-gypsum-ee-4050