Soil water potential monitoring: a gypsum block is usually inserted in the soil, and its electrical resistance can be measured to derive soil dampness.[forty eight] Agates: A type of quartz that sorts in volcanic rock. They can be found in many different shades and patterns. Hydration of Anhydrite: Gypsum may https://www.propanraya.com/id/produk/eco-gypsum-ee-4050