metamorphic
Quartz-rich rock, possibly quartzite
Quartzite (provisional identification; predominantly quartz, SiO₂)
AI-generated identification · may be incorrectPale gray to cream, rough and massive, with a dull to slightly glassy sparkle. Quartz has Mohs hardness 7 and no cleavage; the photo does not show enough detail to confirm interlocking grains or test hardness.
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Physical properties
Pale gray to cream, rough and massive, with a dull to slightly glassy sparkle. Quartz has Mohs hardness 7 and no cleavage; the photo does not show enough detail to confirm interlocking grains or test hardness.
Formation & geological history
If quartzite, it formed when quartz sandstone was recrystallized by heat and pressure; its age cannot be determined from the image. Quartz-rich veins or other silica-rich rocks are also possible.
Uses & applications
Quartzite is used as crushed stone, paving and building stone, and sometimes as a decorative material. This weathered, uncharacterized piece has little apparent commercial value.
Geological facts
The specimen’s pale, uneven surface is consistent with a quartz-rich rock, but visual identification alone cannot distinguish quartzite from vein quartz or some other light-colored rocks.
Field identification & locations
Quartzite commonly scratches glass and resists scratching by a steel knife; a fresh break often reveals tightly interlocking quartz grains. The reported location in western Hungary is not diagnostic, so local geology cannot confirm the ID.
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