mineral

Milky quartz (likely quartzite or massive quartz)

Quartz, SiO₂

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, massive texture, and no obvious cleavage; Mohs hardness 7, specific gravity about 2.65. The cloudy appearance is caused by microscopic fluid inclusions or fractures; the image does not show diagnostic crystal faces.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in hydrothermal veins, pegmatites, and metamorphic rocks; quartzite forms when sandstone recrystallizes. Its exact geological age and whether it is quartz or quartzite cannot be determined from the photograph.

Uses & applications

Used as a silica source for glass, ceramics, and silicon production; quartzite is used for aggregate, paving, and countertops. Attractive translucent pieces have modest lapidary and collecting appeal.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric. Milky quartz commonly develops rounded, irregular masses rather than well-formed crystals.

Field identification & locations

A glassy surface, hardness sufficient to scratch ordinary glass, and lack of cleavage support quartz; quartzite usually shows a granular, fused sandstone texture. Common worldwide, especially in hydrothermal veins and metamorphic belts.