mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to translucent
Luster: Vitreous to greasy

Identified July 6, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins and pegmatites through the cooling and crystallization of silica-rich fluids. It is found in igneous, metamorphic, and sedimentary environments worldwide.

Uses & applications

Used in glass making, ceramics, as an abrasive, in the electronics industry for its piezoelectric properties, and for decorative carvings or landscaping.

Geological facts

The milky white color is caused by tiny inclusions of gas or liquid trapped during the crystal's formation. It is the most common variety of crystalline quartz.

Field identification & locations

Identify in the field by its hardness (will scratch glass), white color, and lack of cleavage. It is found globally in mountains, riverbeds, and as veins in larger rock formations.