mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale. Color: Translucent white to milky cloudy. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific gravity: ~2.65.

Hardness: 7 on Mohs scale
Color: Translucent white to milky cloudy
Luster: Vitreous to greasy

Identified July 22, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Translucent white to milky cloudy. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific gravity: ~2.65.

Formation & geological history

Formed in various geological environments, including hydrothermal veins, pegmatites, igneous intrusive bodies, and sedimentary deposits, often rounded by water action into river or beach pebbles.

Uses & applications

Used in gemstone carvings, decorative landscaping, mineral collections, and historically as a silica source in glassmaking.

Geological facts

The milky or cloudy appearance of milky quartz is caused by tiny gas or fluid inclusions trapped inside the crystal lattice during its growth.

Field identification & locations

Can be identified by its ability to scratch glass (hardness 7), lack of cleavage, and translucent white color. Extensively found in riverbeds, gravel deposits, and pegmatite fields worldwide.