mineral

Quartz-rich rock fragment

Milky quartz, primarily silicon dioxide (SiO₂), possibly quartzite or a feldspar-bearing vein rock

AI-generated identification · may be incorrect

White to translucent, granular and nonmetallic with a vitreous-to-dull luster; quartz hardness is about 7 Mohs, lacks cleavage, and has conchoidal fracture. The small specimen’s exact texture is unclear from the image.

Identified September 12, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as hydrothermal quartz filling a fracture, or as recrystallized quartzite; quartz veins range from Precambrian to recent geological ages. Common in igneous, metamorphic, and sedimentary terrains.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, foundry materials, and electronics; attractive clear or colored pieces may be collected or cut as gemstone material. This fragment appears low-grade and is unlikely to have jewelry value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, often surviving weathering as sand or residual gravel. Milky color results mainly from microscopic fluid inclusions and fractures.

Field identification & locations

Identify by its white translucency, glassy fracture, lack of cleavage, and inability to scratch it with a steel knife; acid does not react. Common worldwide, especially in quartz veins and pegmatites.