mineral

Milky quartz

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-greasy luster; hardness 7 Mohs and no cleavage, with uneven or conchoidal fracture. The specimen appears rough and massive, so crystal form and specific gravity cannot be reliably assessed from the image.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in fractures and veins, or during cooling of silica-rich magma. Quartz occurs in rocks spanning much of geological time; this piece’s age and precise origin cannot be determined visually.

Uses & applications

Commonly collected as a specimen and used as a source of silica in glass, ceramics, and other industrial products; attractive pieces may be used in carvings or jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and has a trigonal crystal structure, though massive milky quartz may show no visible crystal faces.

Field identification & locations

Likely quartz based on its pale color and glassy, translucent appearance; confirm with a scratch test against glass (quartz should scratch it) and check for absence of cleavage. Found worldwide, especially in veins and granites.