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 through the crystallization of silica-rich hydrothermal solutions in veins or as a primary constituent in igneous rocks like granite. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & Applications

Used in the production of glass, ceramics, and electronics (due to piezoelectric properties). In crushed form, it is used for landscaping, construction aggregates, and abrasives.

Geological Facts

Milky quartz is one of the most common varieties of crystalline quartz on Earth. Its white color is often referred to as 'snow quartz' in metaphysical circles. Large veins of milky quartz are often indicators to gold prospectors, as gold is frequently found embedded within quartz veins.

Field Identification & Locations

Identify in the field by its hardness (it will easily scratch glass) and lack of cleavage. It is commonly found in riverbeds as rounded pebbles or as jagged outcroppings in mountainous regions worldwide.

Identified on: 4/24/2026

Mode: Standard