mineral
Quartz Crystal
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on the Mohs scale, Color: Clear to white or milky, Luster: Vitreous (glassy), Crystal Structure: Trigonal, Cleavage: None (exhibits conchoidal fracture), Specific Gravity: 2.65
Identified More mineral →
Explore Quartz Crystal in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on the Mohs scale, Color: Clear to white or milky, Luster: Vitreous (glassy), Crystal Structure: Trigonal, Cleavage: None (exhibits conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins, pegmatites, and as a primary constituent of many igneous, metamorphic, and sedimentary rocks over a vast range of geological ages.
Uses & applications
Used in electronics (oscillators), manufacturing of glass and ceramics, ornamental carvings, gemstones, and metaphysical collections.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust, following feldspar. It exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Easily identified by its distinct hexagonal crystal faces (when present), high hardness of 7 (scratches glass), and conchoidal fracture. Found worldwide in nearly every geological environment.
