Quartz (Smoky/Milky variety)

Physical Properties

Hardness: 7 on Mohs scale; Color: Tan to brownish-white; Luster: Vitreous (glassy) to greasy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & Geological History

Formed through the cooling of silica-rich magma or from hydrothermal veins. This specimen appears weathered/water-worn, suggesting it was likely recovered from a riverbed or alluvial deposit.

Uses & Applications

Used in electronics (as oscillators), glass making, abrasives, and as a semi-precious gemstone in jewelry. Also highly collected by spiritual practitioners and mineral enthusiasts.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which likely has Slavic origins.

Field Identification & Locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and glassy fracture surfaces. Commonly found in most geological environments worldwide, especially in granitic rocks and river gravels.

Identified on: 4/17/2026

Mode: Standard