mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Identified June 17, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to translucent milky; 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 or cooling magma. The milky appearance is caused by tiny fluid or gas inclusions trapped during crystal growth. Found in igneous, metamorphic, and sedimentary environments.

Uses & applications

Used in glassmaking, abrasives, electronics (piezoelectric properties), home decor, and as a collector's specimen. Often used in landscaping and jewelry as cabochons.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. It is often found in large veins that can be several meters thick. In some cultures, it has been used as a 'dream stone' or for grounding energy.

Field identification & locations

Identify by its white opaque color, 7 hardness (scratches glass), and lack of cleavage. Commonly found in mountain ranges, river beds, and as veins in granite or metamorphic rocks. It is ubiquitous globally.