mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to cream-colored due to fluid inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Opaque white to cream-colored due to fluid inclusions
Luster: Vitreous to greasy

Identified June 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of silica-rich hydrothermal veins or within igneous pegmatites. It is one of the most abundant minerals in the Earth's crust and can be found in rocks from virtually all geological ages.

Uses & applications

Used in the manufacturing of glass, ceramics, and sandpaper. High-purity quartz is used in electronics (oscillators) and solar panels. Lower quality specimens are used for landscaping, construction aggregate, and as decorative pocket stones.

Geological facts

The 'milky' appearance is caused by tiny bubbles of gas or liquid trapped during the crystal's growth millions of years ago. It is often a 'pathfinder' mineral for gold, as gold is frequently found within quartz veins.

Field identification & locations

Identify in the field by its ability to scratch glass, its lack of cleavage, and its characteristic waxy or glassy luster. It is ubiquitous globally, commonly found in mountain ranges, stream beds, and gravel pits. Collectors look for well-defined crystal points.