mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: White to translucent creamy, Luster: Vitreous to greasy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified July 20, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: White to translucent creamy, Luster: Vitreous to greasy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Forms in hydrothermal veins, pegmatites, and igneous rocks. It is common in various geological environments from Precambrian to recent times. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, abrasives, electronics (due to piezoelectric properties), and as a gemstone for beads or metaphysical collecting.

Geological facts

Milky quartz is the most common variety of crystalline quartz. While often overlooked for clearer varieties, large masses can be beautifully translucent and are sometimes called 'Snow Quartz'.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and characteristic waxy-to-glassy white appearance. Common in gravel beds and mountain outcrops worldwide.