Clear Quartz

Physical Properties

Hardness: 7 Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal; Cleavage: None/Indistinct; Specific Gravity: 2.65

Formation & Geological History

Forms primarily through the cooling of molten rock (magma) or from hydrothermal solutions in veins. It is found in igneous, metamorphic, and sedimentary environments across all geological ages.

Uses & Applications

Extensively used in electronics (oscillators), optics, glassmaking, construction (as abrasive), and widely in jewelry and spiritual gemstone collections.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. It exhibits piezoelectricity, meaning it generates an electric charge when mechanical stress is applied.

Field Identification & Locations

Identify by its characteristic glassy luster and ability to scratch glass (hardness 7). It typically lacks cleavage, breaking instead with a conchoidal (shell-like) fracture. Found globally in almost all rock types.

Identified on: 5/15/2026

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