mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: Opaque white to translucent
Luster: Vitreous (glassy) to greasy

Identified April 12, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions or cooling magma. Milky quartz gets its characteristic white color from microscopic inclusions of fluids or gas trapped during crystal growth. It is found in igneous, metamorphic, and sedimentary environments globally.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), abrasives, and as a semi-precious gemstone in jewelry or home decor.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in massive veins and can sometimes contain gold inclusions, making it a primary target for gold prospectors.

Field identification & locations

Identify it by its inability to be scratched by a steel knife (hardness 7) and its lack of cleavage. It is commonly found in mountain ranges, pebble beaches, and as veins in granite. For collectors, look for hexagonal crystal points or unique mineral associations.