Quartz

Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, hexagonal crystal system, no cleavage.

Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks, often through hydrothermal veins or crystallization from silica-rich magmas.

Used extensively in electronics, glassmaking, abrasives, and as a gemstone or decorative mineral specimen.

Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties.

Identified by its high hardness, lack of cleavage, and conchoidal fracture. Found worldwide in almost all geological settings.