Milky Quartz

Physical Properties

Hardness: 7 on Mohs scale; Color: Cloudy white to grayish; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & Geological History

Formed from the crystallization of silica-rich hydrothermal fluids or within igneous pegmatites. The 'milky' appearance is caused by tiny fluid or gas inclusions trapped during crystal growth.

Uses & Applications

Used in the production of glass, ceramics, and abrasives. Also used as a gemstone in cabochon form and as a landscaping stone.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of crystalline quartz found in nature.

Field Identification & Locations

Identify by its hardness (scratches glass), lack of cleavage, and white cloudy appearance. Extremely common in riverbeds, mountains, and near quartz veins globally.

Identified on: 4/23/2026

Mode: Standard