The correct answer is: a) Silica sand.
Silica sand is a type of sand that is made up of silicon dioxide (SiO2). It is a very common mineral and is found in many different parts of the world. Silica sand is used in a variety of industries, including the glass and ceramics industries.
Dolomite is a type of rock that is made up of calcium magnesium carbonate (CaMg(CO3)2). It is a relatively soft rock and is often used as a building material. Dolomite is not used in the glass and ceramics industries.
Graphite is a type of mineral that is made up of carbon atoms. It is a very soft mineral and is often used as a lubricant. Graphite is not used in the glass and ceramics industries.
Mica is a type of mineral that is made up of potassium, aluminum, silicon, and oxygen. It is a very thin mineral and is often used as an insulator. Mica is not used in the glass and ceramics industries.
Silica sand is the only mineral that is found along the coastal areas of Gujarat and is used in the glass and ceramics industries.