mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Identified June 25, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions in veins or cooling magma. The white 'milky' appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), abrasives, and as a popular gemstone for lapidary work or metaphysical collection.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. It is often found in large masses and can contain traces of gold in hydrothermal vein deposits.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and white waxy appearance. It is found globally, particularly in mountainous regions and riverbeds as tumbled pebbles.