mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

Identified June 19, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments. Most commonly originates in hydrothermal veins or pegmatites as silicon-rich fluids cool and crystallize over millions of years.

Uses & applications

Used in glassmaking, as an abrasive, in electronics for its piezoelectric properties, as a gemstone for jewelry, and in quartz countertops.

Geological facts

The milky white color is caused by tiny inclusions of gas or liquid trapped during crystal growth. It is the most common variety of crystalline quartz found on Earth's crust.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), its opaque white appearance, and lack of cleavage. It is found in mountain ranges, riverbeds, and as garden stones worldwide.