
mineral
Small translucent quartz fragment
Quartz (SiO₂), possibly milky or near-colorless quartz
AI-generated identification · may be incorrectWhite to translucent, irregularly rounded fragment with a vitreous luster; likely Mohs hardness 7, no obvious cleavage, and conchoidal fracture. Crystal structure is trigonal, though crystal faces are not visible at this scale.
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Physical properties
White to translucent, irregularly rounded fragment with a vitreous luster; likely Mohs hardness 7, no obvious cleavage, and conchoidal fracture. Crystal structure is trigonal, though crystal faces are not visible at this scale.
Formation & geological history
Quartz forms in igneous, metamorphic, and hydrothermal environments through silica-rich melt or fluid crystallization. Its age cannot be determined from the photograph and could range from recent sedimentary transport to ancient bedrock formation.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; clear attractive pieces may be collected but this fragment has little commercial value.
Geological facts
Quartz is one of Earth’s most abundant minerals and is resistant to weathering, commonly accumulating in stream gravels and beach sediments.
Field identification & locations
Possible identification requires testing: it should scratch ordinary glass but not be scratched by a steel knife. Look for hexagonal crystal faces, conchoidal fracture, and absence of cleavage; similar white glass or calcite should be ruled out.
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