
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on Mohs scale, vitreous luster, hexagonal crystal system, transparent to translucent with no cleavage.
Identified More mineral →
Explore Quartz (Rock Crystal) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 7 on Mohs scale, vitreous luster, hexagonal crystal system, transparent to translucent with no cleavage.
Formation & geological history
Forms primarily in igneous pegmatites and hydrothermal veins across diverse geological eras.
Uses & applications
Commonly used in jewelry, electronics as piezoelectric oscillators, optics, and mineral collections.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and displays distinct optical dispersion.
Field identification & locations
Identifiable by its 6-sided prismatic habit, hardness sufficient to scratch glass, and conchoidal fracture.