mineral

Clear Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Colorless to transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None, conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless to transparent
Luster: Vitreous (glassy)

Identified May 2, 2026More mineral →

Explore Clear Quartz in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None, conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

Quartz forms in a wide variety of environments, most commonly by crystallization from molten magma or hydrothermal veins. It is found in igneous, metamorphic, and sedimentary rocks of all ages.

Uses & applications

Extensively used in electronics for its piezoelectric properties, glass manufacturing, abrasives, jewelry (as semi-precious stones), and widely collected for decorative and metaphysical purposes.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which likely has Slavic origins meanings 'hard'. The specimen shown has been cut and polished into a 'tower' or 'point' shape.

Field identification & locations

Identified in the field by its hardness (scratches glass), six-sided prismatic crystal habit, andlack of cleavage. Commonly found in granite, pegmatites, and as sand on beaches. Common locations include Brazil, Madagascar, and the US (Arkansas).