Milky Quartz

Physical Properties

Hardness: 7 on Mohs scale; Color: White to cloudy; Luster: Vitreous to greasy; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & Geological History

Formed from silica-rich hydrothermal fluids or within igneous pegmatites. It is one of the most common minerals in the Earth's crust, found in geological environments spanning billions of years.

Uses & Applications

Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, as a flux in metallurgy, and widely collected as mineral specimens.

Geological Facts

The milky white appearance is caused by tiny inclusions of gas and/or liquid trapped during the crystal's growth. It is the most common variety of crystalline quartz.

Field Identification & Locations

Identify in the field by its hardness (scratches glass), lack of cleavage, and white 'cloudy' appearance. It is found globally in veins, mountains, and stream beds.

Identified on: 4/13/2026

Mode: Standard