Quartz (Milky Variant)

Physical Properties

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

Formation & Geological History

Commonly forms from the cooling of silica-rich magma or through hydrothermal activity in veins. It is found in igneous, metamorphic, and sedimentary environments globally.

Uses & Applications

Used in electronics (piezoelectric properties), glassmaking, abrasives, timekeeping components, and as a semi-precious gemstone in jewelry.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz gets its opaque appearance from tiny fluid inclusions trapped during crystal growth.

Field Identification & Locations

Identify by its hardness (scratches glass), lack of cleavage, and vitreous luster. Found in most mountain ranges and riverbeds. It is a target for amateur collectors due to its ubiquity.

Identified on: 5/10/2026

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