mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glass-like)

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of molten rock or by precipitation from hydrothermal veins. It can be found in igneous, metamorphic, and sedimentary environments across all geological ages.

Uses & applications

Extensively used in electronics (oscillators), glassmaking, abrasives, jewelry (as 'rock crystal'), and healing/spiritual collections.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Famous specimens include the 'Bernier Quartz' and various mega-crystals found in Brazil and Arkansas.

Field identification & locations

Identify by its point (if intact), its ability to scratch glass (hardness 7), and its lack of cleavage. Common in many mountain ranges and riverbeds globally; Brazil and the USA (Arkansas) are premier localities.

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