mineral

Quartz-rich pale rock fragment

Likely milky quartz (SiO₂), possibly quartzite

AI-generated identification · may be incorrect

White to cream, granular to slightly glassy luster, with no obvious cleavage and irregular fracture; quartz hardness is Mohs 7 and specific gravity about 2.65. The image resolution prevents reliable distinction between a quartz crystal, quartzite, or another pale silicate rock.

Identified September 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous and hydrothermal veins, while quartzite forms when sandstone recrystallizes during metamorphism; ages may range from Precambrian to recent. Common sources include vein outcrops, stream gravels, and weathered bedrock.

Uses & applications

Common quartz is used for glass, ceramics, abrasives, and engineered stone; attractive pieces may be collected or used decoratively, though this fragment appears low-grade.

Geological facts

Milky quartz gets its cloudy appearance from microscopic fluid inclusions and structural defects. It is one of Earth’s most abundant and durable minerals.

Field identification & locations

Identify it by its white color, hardness, lack of cleavage, and inability to be scratched by a steel knife; a streak test is white. Common worldwide, especially in quartz veins and quartz-rich metamorphic terrains.