mineral

Milky Quartz

Quartz (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 July 15, 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 from silica-rich hydrothermal fluids cooling in veins or from the crystallization of magma in igneous rocks; occurrences can range from billions of years old to relatively recent geological formations.

Uses & applications

Used in glassmaking, abrasives, electronics (due to piezoelectric properties), construction as an aggregate, and widely in jewelry and landscaping.

Geological facts

The white color is caused by tiny inclusions of liquid or gas trapped during the crystal's growth. It is one of the most common minerals on Earth's crust.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), lack of cleavage, and white opaque appearance. Look for it in gravel beds or protruding as white veins in host rocks.