Milky Quartz

Physical Properties

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & Geological History

Formed through the cooling and crystallization of silica-rich hydrothermal fluids or magma. Its white color is caused by tiny inclusions of gas or liquid trapped during crystal growth. Can be found in various geological ages ranging from billions of years old to relatively young deposits.

Uses & Applications

Used as a gemstone, in glass manufacturing, as a source of silicon for electronics, in landscaping, and as a popular specimen for crystal healing and mineral collectors.

Geological Facts

Quartz is the most abundant and widely distributed mineral found at Earth's surface. Milky Quartz is specifically characterized by its cloudy appearance, often hiding high-purity silica within. It is very resistant to chemical and physical weathering.

Field Identification & Locations

Identify in the field by its ability to scratch glass (hardness 7), lack of cleavage, and white cloudy appearance. It is found globally across all continents, often in veins or as river-tumbled stones.

Identified on: 4/17/2026

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