mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and hexagonal crystal system. It typically appears colorless or white, but can be tinted various colors by impurities.
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, vitreous luster, conchoidal fracture, and hexagonal crystal system. It typically appears colorless or white, but can be tinted various colors by impurities.
Formation & geological history
Forms in wide varieties of geological environments, including igneous, metamorphic, and sedimentary rocks, often crystallizing from silica-rich hydrothermal veins and magma.
Uses & applications
Widely used in electronics, glassmaking, construction materials, and as a semi-precious gemstone in jewelry and lapidary arts.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust, surpassed only by feldspar. Its piezoelectric properties make it essential for keeping accurate time in watches.
Field identification & locations
Easily identified by its distinct crystal habit, lack of cleavage, and ability to scratch glass easily due to its high hardness. It is found worldwide in almost every geological setting.
