Quartz Vein in Host Rock

Physical Properties

Hardness: 7 (Mohs); Color: Milky white to translucent quartz in a grey/green matrix; Luster: Vitreous to waxy; Structure: Hexagonal; Cleavage: None (conchoidal fracture).

Formation & Geological History

Formed through hydrothermal precipitation where mineral-rich hot water flows through fractures in pre-existing rock, cooling and depositing silica over time.

Uses & Applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as decorative architectural stone or collector specimens.

Geological Facts

Quartz is the most abundant and diverse mineral on Earth's surface. Hydrothermal veins like these are often the primary source for gold and other precious metals.

Field Identification & Locations

Identify in the field by the white 'seam' cutting through darker rock; it will scratch glass and lacks cleavage. Commonly found in mountainous regions or areas with historical tectonic activity.

Identified on: 5/2/2026

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