mineral

Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 (Mohs scale)
Color: Colorless to milky white (opaque)
Luster: Vitreous (glassy)

Identified April 16, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of magma or by precipitation from hydrothermal veins. It is one of the most abundant minerals in the Earth's crust and can be found in igneous, metamorphic, and sedimentary rocks of various geological ages.

Uses & applications

Used in the electronics industry for its piezoelectric properties, glass making, abrasives, and as a popular semi-precious gemstone in jewelry or for metaphysical collection.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to chemical and physical weathering, which is why it often makes up the bulk of river and beach sand.

Field identification & locations

Identify in the field by its hardness (it scratches glass) and its lack of cleavage. It is found globally in environments ranging from mountains to riverbeds.