mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, vitreous luster, hexagonal crystal system, conchoidal fracture, and lack of cleavage. Color varies widely from colorless to milky white, pink, purple, or smoky.
Identified More mineral →
Explore Quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 7, vitreous luster, hexagonal crystal system, conchoidal fracture, and lack of cleavage. Color varies widely from colorless to milky white, pink, purple, or smoky.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments through the crystallization of silica-rich fluids and melts. Can precipitate from hydrothermal solutions.
Uses & applications
Widely used in electronics, glassmaking, abrasives, and as a popular gemstone or ornamental specimen for collectors.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties, meaning it generates an electric charge under mechanical stress.
Field identification & locations
Identified by its high hardness (scratches glass), conchoidal fracture, and distinct hexagonal prism habits. Found worldwide in pegmatites, veins, and sandstones.
