Answer: B. Gypsum
Explanation: Gypsum is the mineral that is commonly used as an industrial polish. It has a softness that allows it to be easily ground into a fine powder, making it suitable for polishing and finishing various materials.
Gypsum is a hydrated calcium sulfate mineral that is often found in sedimentary rocks. It is widely used in industrial applications such as construction, agriculture, and manufacturing. In the context of polishing, gypsum is commonly used to create a smooth and shiny surface on materials like metal, wood, and glass.