mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, clear or white color, vitreous luster, hexagonal crystal system, and conchoidal fracture with no true cleavage.
Identified More mineral →
Explore Quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale, clear or white color, vitreous luster, hexagonal crystal system, and conchoidal fracture with no true cleavage.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments through crystallization from silica-rich fluids and melts over a wide range of geological ages.
Uses & applications
Used extensively in electronics, glassmaking, abrasives, precision instruments, and as a popular gemstone in jewelry and crystal collecting.
Geological facts
Quartz is one of the most abundant and ubiquitous minerals in Earth's continental crust. Its piezoelectric properties make it essential for keeping time in quartz watches.
Field identification & locations
Identified by its high hardness (scratches glass), lack of cleavage, and distinct conchoidal fracture; found worldwide in virtually all geological settings.
