mineral
Quartz-bearing rock fragment
Likely quartz (SiO₂) with iron-oxide staining and possible feldspar/matrix minerals
AI-generated identification · may be incorrectPale blue-white, translucent to opaque, with a glassy luster and irregular fracture; apparent hardness about 7 if dominated by quartz. The small size, reflections, and single image prevent reliable determination of cleavage or specific gravity.
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Physical properties
Pale blue-white, translucent to opaque, with a glassy luster and irregular fracture; apparent hardness about 7 if dominated by quartz. The small size, reflections, and single image prevent reliable determination of cleavage or specific gravity.
Formation & geological history
Probably a natural quartz vein or quartz-rich host-rock fragment formed by hydrothermal fluids in a fissure; its age depends on the parent formation and cannot be determined visually.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces may be collected, though this fragment has little commercial value.
Geological facts
The blue appearance may result from surface reflection, inclusions, or lighting rather than true blue quartz. Brown-golden areas are consistent with iron oxides or weathered host material.
Field identification & locations
Look for scratch resistance against glass, a white streak, and lack of obvious cleavage; quartz should not be scratched by a steel knife. Common sources include hydrothermal veins and quartz-rich metamorphic or igneous rocks.
