The correct answer is: A. Quartz
Quartz is a hard, brittle mineral found in igneous, metamorphic, and sedimentary rocks. It is the most common mineral in the Earth’s crust, making up about 12% of the total mass. Quartz is a silicate mineral, meaning that it is made up of silicon and oxygen atoms. It is typically colorless or white, but can also be found in other colors such as pink, yellow, brown, and black. Quartz is used in a variety of products, including glass, ceramics, and electronics.
Mica is a group of minerals that are composed of sheet silicates. Micas are typically transparent or translucent, and they have a pearly or iridescent luster. Micas are used in a variety of products, including electrical insulation, roofing materials, and cosmetics.
Gypsum is a mineral that is composed of calcium sulfate dihydrate. Gypsum is a soft mineral that can be easily scratched with a fingernail. It is typically white or colorless, but can also be found in other colors such as pink, yellow, and brown. Gypsum is used in a variety of products, including drywall, plaster, and fertilizer.
Therefore, the correct answer is A. Quartz.