Clear Quartz

Physical Properties

Hardness: 7 (Mohs scale), Color: Colorless/Transparent, Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: Indistinct (conchoidal fracture), Specific Gravity: 2.65

Formation & Geological History

Formed through the crystallization of magma or from hydrothermal veins. Often found in pegmatites, volcanic rocks, and sedimentary environments where silica-rich fluids permeate cracks.

Uses & Applications

Used in electronics (oscillators), optics, glassmaking, sandpaper, jewelry (as semi-precious stones), and widely collected by mineral enthusiasts.

Geological Facts

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

Field Identification & Locations

Identify by its ability to scratch glass, its six-sided prismatic shape with pointed terminations, and lack of true cleavage. Commonly found in mountainous regions globally, notably Arkansas (USA) and Brazil.

Identified on: 4/29/2026

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