mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

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

Identified June 8, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in hydrothermal veins and pegmatites through the cooling of silica-rich magma or aqueous solutions. The white color is caused by tiny inclusions of liquid or gas trapped during crystal growth.

Uses & applications

Used in glass making, abrasive materials, electronics as a source of silicon, and as a decorative stone in landscaping or low-cost jewelry.

Geological facts

Milky quartz is the most common variety of crystalline quartz. It can often contain gold in hydrothermal vein deposits, making it a primary target for gold prospectors.

Field identification & locations

Can be identified by its white color, hardness (it will scratch glass), and lack of cleavage. It is found globally in almost all geological environments, especially in beach pebbles and river beds.