Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Gypsum is a soft mineral composed of calcium sulfate dihydrate. It is commonly used in the production of plaster and drywall.
Related terms
Plaster of Paris: A type of gypsum that has been heated to remove its water content, resulting in a fine powder that hardens when mixed with water.
Drywall: Also known as gypsum board or plasterboard, it is a panel made of compressed gypsum sandwiched between two layers of paper. It is widely used for interior walls and ceilings in construction.
Alabaster: A translucent form of gypsum that has been used throughout history for sculptures and decorative objects.