Ground Gypsum

Gypsum is a versatile old construction material, used for drywall, plaster and other essentials of the modern home. If you have mined gypsum and turned it to powder, there is a strong chance that you, too, have found a construction use for it. Just make more than you need, as the grinding process tends to create a lot of wastage. As builders will tell you: "you gypsum, you lose some".