mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 (Mohs scale)
Color: White to cloudy translucent
Luster: Vitreous to greasy

Identified July 2, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms during the final stages of hydrothermal or pegmatite crystallization. The milky appearance is caused by tiny liquid or gas inclusions trapped during crystal growth. Widely distributed across all geological ages.

Uses & applications

Used as an abrasive, in glass making, as a source of silicon for electronics, in construction as aggregate, and in landscaping or jewelry.

Geological facts

Milky Quartz is one of the most common minerals in the Earth's crust. It can often contain trace amounts of gold within its veins in certain hydrothermal environments.

Field identification & locations

Identify in the field by its hardness (will scratch glass), white color, and distinctive conchoidal fracture. Often found in quartz veins or as river pebbles.