mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: 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: White to translucent
Luster: Vitreous to greasy

Identified July 19, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to translucent; 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 as a primary constituent of many igneous and metamorphic rocks. Milky appearance is caused by microscopic fluid inclusions trapped during crystal growth.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, landscaping, and ornamental stone.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz found in nature and can indicate the presence of gold in hydrothermal veins.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and white waxy color. It is ubiquitous in most mountain ranges and riverheds worldwide.