Clear Quartz

Physical Properties

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

Formation & Geological History

Formed through the crystallization of silica-rich magma or from hydrothermal veins. It is one of the most common minerals in the Earth's crust and can be found in igneous, metamorphic, and sedimentary environments.

Uses & Applications

Used in electronics (oscillators), glassmaking, jewelry (as semi-precious gemstones), and high-precision optical equipment.

Geological Facts

Quartz is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress. This property makes it essential for keeping time in quartz watches.

Field Identification & Locations

Identify in the field by its hardness (will scratch glass), conchoidal (shell-like) fracture, and lack of cleavage. Common in granite outcrops, riverbeds (as pebbles), and as crystals in geodes or veins.

Identified on: 4/13/2026

Mode: Standard