👉 Silicean is a chemical element that has the symbol Si and atomic number 16. It is a grayish-white, lustrous, brittle mineral with a characteristic octahedral crystal structure. Silica is a component of many minerals, such as quartz, calcite, and pyroclastite, which are used in various industries including construction, medicine, and materials science. Silicean is also known for its role in the production of glass, which is used to make