mineral

Milky quartz crystal

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Translucent white to pale yellow with vitreous luster and an irregular, partly crystal-terminated form; hardness 7 Mohs, trigonal crystal system, no cleavage, and conchoidal fracture. Brown flecks may be iron-oxide staining or mineral inclusions.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and cavities within igneous or metamorphic rocks; its age depends on the host deposit and can range from millions to billions of years.

Uses & applications

Commonly collected as a mineral specimen; quartz is also used in glass, electronics, abrasives, and jewelry.

Geological facts

Quartz is among Earth’s most abundant minerals and often forms six-sided prismatic crystals, though this specimen appears broken or incomplete.

Field identification & locations

Identify it by its glassy luster, hardness sufficient to scratch glass, and lack of cleavage; common worldwide in quartz veins and pegmatites. The photo alone cannot confirm the pale yellow tint or inclusions’ identity.