mineral

Milky Quartz

Silicon Dioxide (SiO2)

7 on Mohs scale, milky white to translucent, greasy or vitreous luster, trigonal crystal system with hexagonal prisms, conchoidal fracture (no cleavage), specific gravity 2.65

Identified April 6, 2026More mineral →

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Physical properties

7 on Mohs scale, milky white to translucent, greasy or vitreous luster, trigonal crystal system with hexagonal prisms, conchoidal fracture (no cleavage), specific gravity 2.65

Formation & geological history

Formed through the cooling and crystallization of silica-rich hydrothermal fluids or magma. Often found in hydrothermal veins and pegmatites. The milky appearance is caused by tiny inclusion of liquid or gas trapped during crystal growth.

Uses & applications

Used as a gemstone in tumbled jewelry, as a source of silicon for electronics and solar panels, in glassmaking, and frequently as landscaping stone or decorative rock.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz specifically gets its color from microscopic bubbles called fluid inclusions that were trapped several kilometers below the surface millions of years ago.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), its white waxy appearance, and the lack of cleavage planes. Found globally in almost all geological environments.