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 May 12, 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 cooling of silica-rich hydrothermal fluids in veins or as a late-stage crystallate in igneous rocks. The white color is caused by tiny inclusions of liquid, gas, or both trapped during crystal growth.

Uses & applications

Used as a gemstone in jewelry (cabochons), in glass manufacturing, as an abrasive, and extensively in spiritual or decorative stone markets.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. Milky quartz is the most common variety of crystalline quartz found in nature. It is often found in massive form rather than distinct crystals.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and characteristic waxy-to-glassy luster. It is commonly found in gravel pits, riverbeds, and as veins within granite or metamorphic boulders.