mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

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

Identified May 15, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments, most commonly from hydrothermal veins or as a constituent of granite. The milky opacity is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in the glass and ceramics industry, as an abrasive, in construction as aggregate, and as a semi-precious gemstone in jewelry or for metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in massive vein deposits and is frequently associated with gold deposits.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and waxy luster. Common worldwide, especially in mountainous regions and quartz veins within granite outcrops.