mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to yellowish due to iron inclusions; 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 yellowish due to iron inclusions
Luster: Vitreous to greasy

Identified April 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed from the cooling of silica-rich magma or from hydrothermal veins. It can be found in almost all geological ages and environments, particularly in igneous and metamorphic terrains.

Uses & applications

Used in glassmaking, as an abrasive, in electronics (piezoelectric properties), and widely in jewelry or as decorative landscaping stones.

Geological facts

Milky quartz gets its cloudy appearance from tiny fluid inclusions of gas or liquid trapped during crystal growth. It is one of the most common minerals on Earth's crust.

Field identification & locations

Identify by its hardness (it will scratch glass) and lack of cleavage. Look for the white cloudy appearance and greasy luster. It is commonly found in riverbeds, mountain trails, and within vein deposits.