mineral

Milky quartz

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent with a vitreous luster and hexagonal crystal structure. No cleavage; irregular to conchoidal fracture, with rusty-brown iron-oxide staining visible.

Identified September 28, 2026More mineral →

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Physical properties

Hardness 7 Mohs; white to translucent with a vitreous luster and hexagonal crystal structure. No cleavage; irregular to conchoidal fracture, with rusty-brown iron-oxide staining visible.

Formation & geological history

Forms when silica-rich fluids crystallize in veins and cavities, or through cooling of silica-rich melts. Quartz occurs in rocks of many geological ages; this specimen’s age and exact setting cannot be determined from the image.

Uses & applications

Commonly used for ornamental objects, collecting, and crushed aggregate; clear, well-formed quartz may be used in jewelry and electronics.

Geological facts

Quartz is one of Earth’s most abundant minerals and is a major component of many igneous, sedimentary, and metamorphic rocks.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch glass, and lack of cleavage; common worldwide in veins, pegmatites, and numerous rock types. The photo suggests milky quartz with iron staining.