Milky Quartz

Physical Properties

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

Formation & Geological History

Formed in hydrothermal veins and pegmatites through the cooling of silica-rich solutions and magma. It is found in geological environments ranging from Precambrian to modern times.

Uses & Applications

Used in glassmaking, abrasives, electronics (quartz oscillator), and as decorative ornaments or carvings such as the mushroom shown.

Geological Facts

Milky quartz gets its cloudy appearance from microscopic inclusions of liquid, gas, or other minerals trapped during crystal growth. It is the most common variety of crystalline quartz.

Field Identification & Locations

Identify by its white color, inability to be scratched by steel, and lack of cleavage. It is found globally in mountain ranges and riverbeds.

Identified on: 5/5/2026

Mode: Standard