mineral
Gray quartz pebble or fragment
Quartz (SiO₂)
AI-generated identification · may be incorrectTranslucent gray, vitreous luster, irregular fracture and no obvious cleavage; quartz has Mohs hardness 7 and a hexagonal crystal structure. The image is not detailed enough to confirm the identification or measure specific gravity.
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Physical properties
Translucent gray, vitreous luster, irregular fracture and no obvious cleavage; quartz has Mohs hardness 7 and a hexagonal crystal structure. The image is not detailed enough to confirm the identification or measure specific gravity.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids or forms as grains in igneous, metamorphic, and sedimentary rocks; its age depends on the source rock. This fragment’s geological setting and age cannot be determined from the image.
Uses & applications
Quartz is used in glass, electronics, abrasives, and jewelry; this small, rough piece has little evident commercial value.
Geological facts
Quartz is one of Earth’s most abundant minerals and breaks with a curved, glass-like conchoidal fracture.
Field identification & locations
A hardness test (it scratches glass) and lack of cleavage can help distinguish quartz from softer lookalikes. Small quartz fragments are widespread; the photo does not establish a specific locality.
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