mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to translucent; Luster: Vitreous (glassy) to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to translucent
Luster: Vitreous (glassy) to waxy

Identified June 19, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White to translucent; Luster: Vitreous (glassy) to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal fluids or within pegmatites. The white color is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, and as a semi-precious gemstone in jewelry or decor.

Geological facts

Quartz is the most abundant mineral in the Earth's continental crust. Milky quartz specifically is one of the most common varieties and is found in almost every geological environment.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and characteristic waxy/glassy appearance. This specimen appears water-worn, likely found in a river or beach setting.