mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, with a vitreous-to-waxy luster and hexagonal crystal structure. No cleavage; uneven to conchoidal fracture; specific gravity about 2.65.

Identified October 3, 2026More mineral →

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Physical properties

Hardness 7 Mohs; white to translucent, with a vitreous-to-waxy luster and hexagonal crystal structure. No cleavage; uneven to conchoidal fracture; specific gravity about 2.65.

Formation & geological history

Forms when silica-rich fluids crystallize in veins and cavities, and also occurs in igneous and metamorphic rocks. Quartz is geologically widespread across many ages; this rough fragment’s age and source cannot be determined from the image.

Uses & applications

Commonly used for carvings, ornaments, and mineral collections; quartz also has major industrial uses in glass, ceramics, and electronics.

Geological facts

Its cloudy appearance is typically caused by microscopic fluid or gas inclusions, or tiny fractures that scatter light.

Field identification & locations

Look for its glassy sheen, hardness (it can scratch ordinary glass), and lack of cleavage. Milky quartz occurs worldwide, especially in quartz veins and granites.