Milky Quartz

Physical Properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & Geological History

Formed from silica-rich hydrothermal fluids cooling in veins/pockets, often in igneous or metamorphic host rocks. This type of quartz is ubiquitous across geological ages.

Uses & Applications

Used in glassmaking, abrasives, and as a source of silicon for electronics. Lower quality is used as gravel or decorative stone; high quality used in metaphysical jewelry.

Geological Facts

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

Field Identification & Locations

Identify by its hardness (scratches glass), lack of cleavage, and white cloudy appearance. Extremely common in granite and mountain ranges globally.

Identified on: 5/2/2026

Mode: Standard