mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 (Mohs scale), Color: Opaque white to milky, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified June 18, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Opaque white to milky, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or as a secondary mineral in various rock types. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, abrasives, jewelry (cabochons), and as a construction aggregate. Also popular for decorative landscaping and as metaphysical 'healing' stones.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz and can often be found as whole 'veins' running through host rocks like granite or shale.

Field identification & locations

Identified in the field by its hardness (will scratch glass), white color, andLack of cleavage. It is extremely common in riverbeds, glacial till, and mountains.